1981 Chevrolet K20 Motor Oil

Essential 1981 Chevrolet K20 Motor Oil

FRAM – 10W-30 Small Engine 10W-30 Conventional Oil: 1 Quart (Part No.464-32)

10W-30 Small Engine 10W-30 Conventional Oil: 1 Quart

from

$7.29
10W-30 Small Engine 10W-30 Conventional Oil: 1 Quart

Castrol – GTX High Mileage 5W-20 Synthetic Blend Engine Oil: 5 Quart (Part No.1597C4)

GTX High Mileage 5W-20 Synthetic Blend Engine Oil: 5 Quart

from

$30.99
Castrol GTX High Mileage motor oil is the leading consumer high-mileage brand. You won’t need to worry about using a high mileage oil or synthetic because this is both. It’s a synthetic blend engine oil that helps extend the life of your engine by protecting against sludge, wear and burn-off and also liquid engineered to protect your emission system. One of the leading causes of ‘check engine’ lights coming on in high mileage cars is actually catalytic converter failure, which can be caused by phosphorous in engine oil. While phosphorous is present in all engine oils for its ability to reduce wear, it is effectively poisonous to catalytic converters. Castrol GTX High Mileage Motor Oil is liquid engineered with Phosphorous Replacement Technology to replace some of the phosphorous with an advanced additive that maintains robust wear protection. When you want to extend the life of your high mileage engine and emission system and find out how many miles you can go on a high-mileage oil, there is no better choice than Castrol GTX High Mileage Motor Oil.

Product Features:
  • Phosphorus replacement technology to help extend the life of the emission system
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (based on api and acea volatility specifications)
  • Improved fuel economy (in 5w-20, 5w-30 and 10w-30 grades versus industry specifications)
  • Part synthetic oil: GTX High Mileage Engine Oil is a part synthetic oil that provides extra protection for older vehicles, making it an ideal choice for high mileage engines.
  • Protects against sludge, wear and burn-off: This synthetic blend engine oil helps extend the life of your engine by protecting against sludge, wear and burn-off, ensuring that your engine runs smoothly for longer.
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Pennzoil – Platinum 10W-30 Full Synthetic Motor Oil, 5 Quart (Part No.550046205)

Platinum 10W-30 Full Synthetic Motor Oil, 5 Quart

from

$37.99
Pennzoil Platinum full synthetic SAE 10W-30 motor oil is uniquely engineered from our revolutionary PurePlus gas-to-liquid technology, which is a patented process that converts pure natural gas into a high quality, full synthetic base oil. Our high-quality base oil is 99.5% pure, contains fewer impurities than base oils made from crude oil, and when combined with our advanced additive technology creates one of the best formulations in our Pennzoil portfolio. Modern engine technologies have evolved over the years and today’s engine parts have reached an unprecedented level of fine manufacturing tolerances which require a high-quality engine oil to help provide complete engine protection. This includes protection against abnormal combustion phenomenon like low-speed pre-ignition observed in modern turbocharged gasoline direct injection (TGDI) engines. Our Pennzoil Full Synthetic products are engineered for modern engines and offer the following benefits without compromise. Better Fuel Economy. With Pennzoil Platinum full synthetic motor oil, you can drive on average an extra 550 miles vs a dirty engine. Protects Horsepower. Pennzoil Platinum Full Synthetic motor oil helps protect against loss of power by helping to protect your engine against wear and deposit formation. Unsurpassed Wear Protection. When it comes to protecting the internal parts of your engine from metal-on-metal contact, no other leading synthetic motor oil provides better wear protection than Pennzoil Platinum Full Synthetic motor oil. Excellent Temperature Performance. When exposed to extreme cold temperatures, Pennzoil Platinum Full Synthetic motor oil flows faster, meaning that the motor oil travels quickly to lubricate the various engine parts.

Product Features:
  • Provides better fuel economy-drive on average an extra 550 miles per year (versus a dirty engine)
  • Pennzoil Platinum 10W-30 keeps pistons up to 45% cleaner than the toughest industry standard (Based on Sequence IIIH results)
  • No other leading synthetic oil provides better wear protection from friction (Based on Sequence IVA wear test using SAE 5W-30)
  • Formulated to provide faster low-temperature oil flow and protection in extreme heat
  • Helps protect engines from loss of power
  • Formulated for modern turbocharged engines-GF-6, API SP/SP-Resource Conserving and all previous categories
  • Revolutionary PurePlus Technology: Engineered from Pennzoil’s patented PurePlus gas-to-liquid technology, converting pure natural gas into high-quality, full synthetic base oil that is 99.5% pure.
  • Superior Wear Protection: Offers unsurpassed protection against metal-on-metal contact, ensuring the internal parts of your engine are well-protected from wear and deposit formation.
  • Engine Protection for Modern Technologies: Specially designed to protect against low-speed pre-ignition in modern turbocharged gasoline direct injection (TGDI) engines, providing complete engine protection.
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Castrol – EDGE Extended Performance Full Synthetic 5W20 Motor Oil 1 Quart (Part No.15D529)

EDGE Extended Performance Full Synthetic 5W20 Motor Oil 1 Quart

from

$13.49
Castrol® EDGE® Extended Performance is Castrol’s most advanced full synthetic motor oil. It provides ultimate performance and the strength to enable an extended drain of 20,000 miles or a full year (whichever comes first).

Product Features:
  • Approved and Licensed Specifications include: API SP/SN PLUS, ILSAC GF-6, GM dexos1 Gen 2, ACEA C5, Ford WSS-M2C960-A1, Meets engine test performance of Chrysler MS-6395
  • 10X Better High Temperature Performance (Seq IIIH test vs. API SP limit)
  • 6X Better Wear Protection (Based on Seq IVA vs. latest test limit)
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FRAM – Full Synthetic High Mileage 5W-20 Motor Oil: 5 Quart (Part No.F923-5QT)

Full Synthetic High Mileage 5W-20 Motor Oil: 5 Quart

from

$28.99
FRAM Full Synthetic High Mileage SAE 5W-20 is a full synthetic motor oil blended with high quality synthetic base stocks and and enhanced additives that meet the stringent API: SP, SN, SM, SL, SJ, and ILSAC GF-6A specifications while reducing leaks and oil consumption in worn or higher mileage engines. Formulated with synthetic base stocks, this oil offers increased oxidation inhibition performance as well as increased high and low temperature performance when compared against conventional oils. The FRAM Full Synthetic High Mileage SAE 5W-20 is formulated to help clean out sludge buildup and keep engines running clean and with increased efficiency and power. Specially designed for engines with over 75,000 miles, the FRAM Full Synthetic High Mileage SAE 5W-20 provides the ultimate protection for your higher mileage engine. Specifically formulated for the rigorous environment of gas-direct engine (GDI) and turbo gas-direct engine (TGDI) designs as well as providing increased protection for carbureted or normally fuel injected engines. FRAM Full Synthetic High Mileage SAE 5W-20 contains additive technology designed to prevent low-speed pre-ignition (LSPI). LSPI can lead to pre-mature engine failure and is a major concern of the automotive industry for vehicles employing GDI or TGDI technology. This oil also provides increased wear protection, oxidation and shear stability for higher mileage vehicles over previous oil categories.

Product Features:
  • Faster oil flow at start-up
  • Fuel efficiency gains over heavier grade oils
  • Reduces oil cumsumption
  • Excellent sludge and varnish protection
  • Slows engine leaks
  • Outstanding thermal and oxidation stability
  • Lowers oil vaporization and consumption at extreme conditions
  • ALWAYS REFER TO YOUR VEHICLES OPERATING MANUAL TO SELECT THE CORRECT GRADE OIL FOR YOUR ENGINE.
  • Ultimate Protection for High Mileage Engines: Designed for engines with over 75,000 miles, this oil provides the ultimate protection, making it ideal for higher mileage vehicles.
  • Advanced LSPI Prevention Technology: Contains additive technology to prevent low-speed pre-ignition (LSPI), a major concern for vehicles with gas-direct injection (GDI) and turbo gas-direct injection (TGDI) engines, helping to prevent premature engine fai
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Castrol – GTX High Mileage Synthetic Blend 10W-30 Motor Oil: Helps Protect Emission Systems, 1 Quart (Part No.149D6C)

GTX High Mileage Synthetic Blend 10W-30 Motor Oil: Helps Protect Emission Systems, 1 Quart

from

$10.49
Castrol® GTX® High Mileage motor oil is the leading consumer high-mileage brand. It’s a synthetic blend motor oil that helps extend the life of your engine by protecting against sludge, wear and burn-off. Castrol GTX High Mileage is also engineered to protect your emission system. One of the leading causes of ‘check engine’ lights coming on in high mileage cars is catalytic converter failure, which can be caused by phosphorous in engine oil. While phosphorous is present in all engine oils for its ability to reduce wear, it is effectively poisonous to catalytic converters. Castrol GTX High Mileage is formulated with Phosphorous Replacement Technology to replace some of the phosphorous with an advanced additive that maintains robust wear protection. When you want to extend the life of your high mileage engine and emission system, there is no better choice than Castrol GTX High Mileage.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (based on API and ACEA volatility specifications)
  • Seal conditioners to help reduce leaks
  • Advanced additives that minimize engine wear
  • Improved fuel economy (in 5W-20, 5W-30 and 10W-30 grades versus industry specifications)
  • Meets or exceeds API SP/SN PLUS/SN and ILSAC GF-6 specs
  • Engine Longevity: Castrol GTX High Mileage motor oil is specifically designed to extend the life of high mileage engines by protecting against sludge, wear, and burn-off.
  • Emission System Protection: Engineered to safeguard your emission system, this motor oil helps prevent catalytic converter failure, a common cause of ‘check engine’ lights in high mileage vehicles.
  • Synthetic Blend Composition: This 10W-30 synthetic blend motor oil offers superior performance and protection compared to conventional oils, making it ideal for high mileage engines.
  • Trusted Brand: As a leading consumer high-mileage brand, Castrol GTX High Mileage provides reliable and effective engine protection, ensuring your vehicle runs smoothly for longer.
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Castrol – GTX High Mileage Synthetic Blend 5W-20 Motor Oil: Helps Protect Emission Systems, 1 Quart (Part No.15B6E6)

GTX High Mileage Synthetic Blend 5W-20 Motor Oil: Helps Protect Emission Systems, 1 Quart

from

$10.49
Castrol® GTX® High Mileage motor oil is the leading consumer high-mileage brand. It’s a synthetic blend motor oil that helps extend the life of your engine by protecting against sludge, wear and burn-off. Castrol GTX High Mileage is also engineered to protect your emission system. One of the leading causes of ‘check engine’ lights coming on in high mileage cars is catalytic converter failure, which can be caused by phosphorous in engine oil. While phosphorous is present in all engine oils for its ability to reduce wear, it is effectively poisonous to catalytic converters. Castrol GTX High Mileage is formulated with Phosphorous Replacement Technology to replace some of the phosphorous with an advanced additive that maintains robust wear protection. When you want to extend the life of your high mileage engine and emission system, there is no better choice than Castrol GTX High Mileage.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (based on API and ACEA volatility specifications)
  • Seal conditioners to help reduce leaks
  • Advanced additives that minimize engine wear
  • Improved fuel economy (in 5W-20, 5W-30 and 10W-30 grades versus industry specifications)
  • Meets or exceeds API SP/SN PLUS/SN, ILSAC GF-6 and latest Ford specs
  • Synthetic Blend Composition: Combines the benefits of synthetic and conventional oils to provide superior protection against sludge, wear, and burn-off, extending the life of your high mileage engine.
  • High Mileage Engine Care: Designed for vehicles with high mileage, offering enhanced protection to keep your engine running smoothly and efficiently.
  • Optimal Viscosity: With an SAE oil weight of 5W-20, this motor oil ensures optimal performance and protection in a wide range of temperatures and driving conditions.
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Pennzoil – Platinum 10W-30 Full Synthetic Engine Oil, 1 Quart (Part No.550022687)

Platinum 10W-30 Full Synthetic Engine Oil, 1 Quart

from

$11.49
Pennzoil Platinum full synthetic SAE 10W-30 motor oil is uniquely engineered from our revolutionary PurePlus gas-to-liquid technology, which is a patented process that converts pure natural gas into a high quality, full synthetic base oil. Our high-quality base oil is 99.5% pure, contains fewer impurities than base oils made from crude oil, and when combined with our advanced additive technology creates one of the best formulations in our Pennzoil portfolio. Modern engine technologies have evolved over the years and today’s engine parts have reached an unprecedented level of fine manufacturing tolerances which require a high-quality engine oil to help provide complete engine protection. This includes protection against abnormal combustion phenomenon like low-speed pre-ignition observed in modern turbocharged gasoline direct injection (TGDI) engines.

Product Features:
  • Provides better fuel economy-drive on average an extra 550 miles per year (versus a dirty engine)
  • Pennzoil platinum 10w-30 keeps pistons up to 45% cleaner than the toughest industry standard (based on sequence iiih results)
  • No other leading synthetic oil provides better wear protection from friction (based on sequence iva wear test using sae 5w-30)
  • Formulated to provide faster low-temperature oil flow and protection in extreme heat
  • Helps protect engines from loss of power
  • Formulated for modern turbocharged engines-gf-6, api sp/sp-resource conserving and all previous categories
See More

FRAM – Full Synthetic High Mileage 10W-30 Motor Oil: 5 Quart (Part No.F943-5QT)

Full Synthetic High Mileage 10W-30 Motor Oil: 5 Quart

from

$28.99
FRAM Full Synthetic High Mileage SAE 10W-30 is a full synthetic motor oil blended with high quality synthetic base stocks and and enhanced additives that meet the stringent API: SP, SN, SM, SL, SJ, and ILSAC GF-6A specifications while reducing leaks and oil consumption in worn or higher mileage engines. Formulated with synthetic base stocks, this oil offers increased oxidation inhibition performance as well as increased high and low temperature performance when compared against conventional oils. The FRAM Full Synthetic High Mileage SAE 10W-30 is formulated to help clean out sludge buildup and keep engines running clean and with increased efficiency and power. Specially designed for engines with over 75,000 miles, the FRAM Full Synthetic High Mileage SAE 10W-30 provides the ultimate protection for your higher mileage engine. Specifically formulated for the rigorous environment of gas-direct engine (GDI) and turbo gas-direct engine (TGDI) designs as well as providing increased protection for carbureted or normally fuel injected engines. FRAM Full Synthetic High Mileage SAE 10W-30 contains additive technology designed to prevent low-speed pre-ignition (LSPI). LSPI can lead to pre-mature engine failure and is a major concern of the automotive industry for vehicles employing GDI or TGDI technology. This oil also provides increased wear protection, oxidation and shear stability for higher mileage vehicles over previous oil categories.

Product Features:
  • Faster oil flow at start-up
  • Fuel efficiency gains over heavier grade oils
  • Reduces oil cumsumption
  • Excellent sludge and varnish protection
  • Slows engine leaks
  • Outstanding thermal and oxidation stability
  • Lowers oil vaporization and consumption at extreme conditions
  • ALWAYS REFER TO YOUR VEHICLES OPERATING MANUAL TO SELECT THE CORRECT GRADE OIL FOR YOUR ENGINE.
  • Engine Cleaning and Efficiency: Helps clean out sludge buildup, keeping engines running clean with increased efficiency and power, ideal for engines with over 75,000 miles.
  • Advanced LSPI Prevention: Contains additive technology designed to prevent low-speed pre-ignition (LSPI), a major concern for vehicles with gas-direct engine (GDI) and turbo gas-direct engine (TGDI) designs.
  • Comprehensive Engine Protection: Provides increased wear protection, oxidation, and shear stability for higher mileage vehicles, meeting stringent API: SP, SN, SM, SL, SJ, and ILSAC GF-6A specifications.
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Castrol – 1 Qt Full Synthetic 5W-20 Engine Oil – 3X Stronger Against Viscosity Breakdown (Part No.15B743)

1 Qt Full Synthetic 5W-20 Engine Oil - 3X Stronger Against Viscosity Breakdown

from

$9.99
Castrol Ultraclean synthetic blend engine oil is our cleanest GTX ever. Environmental factors such as poor fuel quality, hot weather and stop-start driving conditions can lead to the buildup of sludge that can reduce engine life, power and fuel economy. Castrol Ultraclean has a double-action formula proven to clean away the sludge that can block engine oilways and helps prevent new sludge formation from occurring. In fact, it provides up to 1.4X better sludge protection than is demanded by the latest industry standard (as measured in the Sequence VH Sludge test vs. API SP test limits). No other oil keeps engines cleaner.

Product Features:
  • Premium-quality base oils and anti-wear additives that help extend the life of your engine
  • 1.4x superior sludge protection compared to tough industry standards, as measured in the sequence vh sludge test vs. api sp test limits
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against high-temperature deposits
  • Meets or exceeds api sp/sn plus/sn, ilsac gf-6 and latest ford specs
  • Unsurpassed thermal breakdown protection: GTX Engine Oil, 5W-20 provides superior protection against thermal breakdown, ensuring that your engine stays protected even under extreme temperatures.
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Valvoline – Advanced Full Synthetic 10W-30 Motor Oil: Maximizes Engine Life, 5 Quart (Part No.881165)

Advanced Full Synthetic 10W-30 Motor Oil: Maximizes Engine Life, 5 Quart

from

$36.99
Today’s advanced engine technology requires advanced protection. Valvoline Advanced Full Synthetic, the motor oil designed to protect today’s sophisticated engines, contains premium anti-wear additives, superior antioxidants and extra detergents. It protects 40% better against wear, resists oil breakdown 10-times better, and defends 25% more against deposits than industry standards for maximum performance and engine longevity. And with an exceptional range of temperature protection your engine will ready for extreme weather. Valvoline invented motor oil 150 years ago, and we’ve been reinventing it ever since. Get Valvoline Advanced Full Synthetic and give your engine the advanced protection proven to maximize engine life.

Product Features:
  • ADVANCED PROTECTION AGAINST the four main causes of engine breakdown: wear friction heat and deposits
  • 40% BETTER WEAR PROTECTION vs. industry standard as tested in the Sequence IVB engine test
  • 25% BETTER DEPOSIT PROTECTION with superior engine cleaning detergents as tested in the GMOD engine test
  • EXCEPTIONAL HIGH/LOW TEMPERATURE PROTECTION defends your motor no matter the weather conditions
  • MEETS OR EXCEEDS ALL REQUIREMENTS of ILSAC GF-6A, API SP, API SN with SN PLUS, API SN
  • Enhanced Oil Stability: Resists oil breakdown 10-times better than industry standards, providing consistent performance and reliability.
  • Premium Additives: Contains premium anti-wear additives, superior antioxidants, and extra detergents for maximum performance and engine longevity.
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Castrol – GTX 10W-30 High Mileage Synthetic Blend Motor Oil: 5 Quart (Part No.1597B0)

GTX 10W-30 High Mileage Synthetic Blend Motor Oil: 5 Quart

from

$30.99
Castrol GTX High Mileage motor oil is the leading consumer high-mileage brand. You won’t need to worry about using a high mileage oil or synthetic because this is both. It’s a synthetic blend engine oil that helps extend the life of your engine by protecting against sludge, wear and burn-off and also liquid engineered to protect your emission system. One of the leading causes of ‘check engine’ lights coming on in high mileage cars is actually catalytic converter failure, which can be caused by phosphorous in engine oil. While phosphorous is present in all engine oils for its ability to reduce wear, it is effectively poisonous to catalytic converters. Castrol GTX High Mileage Motor Oil is liquid engineered with Phosphorous Replacement Technology to replace some of the phosphorous with an advanced additive that maintains robust wear protection. When you want to extend the life of your high mileage engine and emission system and find out how many miles you can go on a high-mileage oil, there is no better choice than Castrol GTX High Mileage Motor Oil.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (Based on API and ACEA volatility specifications)
  • Improved fuel economy (In 5W-20, 5W-30 and 10W-30 grades versus industry specifications)
  • Synthetic Blend Composition: Castrol GTX High Mileage Motor Oil is a synthetic blend, offering the benefits of both conventional and synthetic oils for superior engine protection.
  • Extended Engine Life: Designed to protect against sludge, wear, and burn-off, this motor oil helps extend the life of high mileage engines.
  • Optimal Viscosity: With an SAE oil weight of 10W-30, this motor oil provides excellent performance in a wide range of temperatures, ensuring reliable engine protection.
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FRAM – Full Synthetic 5W-30 dexos 1 Gen 3 Motor Oil: 1 Quart (Part No.F930)

Full Synthetic 5W-30 dexos 1 Gen 3 Motor Oil: 1 Quart

from

$7.49
FRAM Engine Oil Full Synthetic SAE 5W-30 is a full synthetic motor oil blended with high quality synthetic base stocks and the latest additive technology to meet the stringent API: SP, SN, SM, SL, SJ, GM dexos®1 Gen 3 and ILSAC GF-6A specifications to provide the ultimate protection for your engine. Specifically formulated for the rigorous environment of gas-direct engine (GDI) and turbo gas-direct engine (TGDI) designs as well as providing increased protection for carbureted or normally fuel injected engines. FRAM Engine Oil Full Synthetic SAE 5W-30 contains additive technology designed to prevent low-speed pre-ignition (LSPI). LSPI can lead to pre-mature engine failure and is a major concern of the automotive industry for vehicles employing GDI or TGDI technology. This oil also provides increased wear protection, oxidation and shear stability over previous oil categories. FRAM Engine Oil Full Synthetic SAE 5W-30 and is a fully licensed GM dexos®1 Gen 3 motor oil.

Product Features:
  • Faster oil flow at start-up
  • Fuel efficiency gains over heavier grade oils
  • Excellent sludge and varnish protection
  • Outstanding thermal and oxidation stability
  • Lowers oil vaporization and consumption at extreme conditions
  • ALWAYS REFER TO YOUR VEHICLES OPERATING MANUAL TO SELECT THE CORRECT GRADE OIL FOR YOUR ENGINE.
  • Ultimate Engine Protection: FRAM Engine Oil Full Synthetic SAE 5W-30 meets stringent API: SP, SN, SM, SL, SJ, GM dexos«1 Gen 3, and ILSAC GF-6A specifications, ensuring top-tier protection for your engine.
  • Advanced Additive Technology: Specifically formulated to prevent low-speed pre-ignition (LSPI), a major concern for vehicles with gas-direct engine (GDI) and turbo gas-direct engine (TGDI) designs, reducing the risk of premature engine failure.
  • Enhanced Wear Protection: Provides increased wear protection, oxidation, and shear stability over previous oil categories, extending the life of your engine.
  • Versatile Compatibility: Suitable for use in carbureted, normally fuel-injected engines, and the rigorous environment of GDI and TGDI engines, offering broad application versatility.
  • Fully Licensed GM dexos«1 Gen 3: This oil is a fully licensed GM dexos«1 Gen 3 motor oil, ensuring it meets the high standards set by General Motors for optimal engine performance.
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FRAM – 10W-30 High Mileage Full Synthetic Engine Oil: 1 Quart (Part No.F943)

10W-30 High Mileage Full Synthetic Engine Oil: 1 Quart

from

$7.99
FRAM Full Synthetic High Mileage SAE 10W-30 is a full synthetic motor oil blended with high quality synthetic base stocks and and enhanced additives that meet the stringent API: SP, SN, SM, SL, SJ, and ILSAC GF-6A specifications while reducing leaks and oil consumption in worn or higher mileage engines. Formulated with synthetic base stocks, this oil offers increased oxidation inhibition performance as well as increased high and low temperature performance when compared against conventional oils. The FRAM Full Synthetic High Mileage SAE 10W-30 is formulated to help clean out sludge buildup and keep engines running clean and with increased efficiency and power. Specially designed for engines with over 75,000 miles, the FRAM Full Synthetic High Mileage SAE 10W-30 provides the ultimate protection for your higher mileage engine. Specifically formulated for the rigorous environment of gas-direct engine (GDI) and turbo gas-direct engine (TGDI) designs as well as providing increased protection for carbureted or normally fuel injected engines. FRAM Full Synthetic High Mileage SAE 10W-30 contains additive technology designed to prevent low-speed pre-ignition (LSPI). LSPI can lead to pre-mature engine failure and is a major concern of the automotive industry for vehicles employing GDI or TGDI technology. This oil also provides increased wear protection, oxidation and shear stability for higher mileage vehicles over previous oil categories.

Product Features:
  • Faster oil flow at start-up
  • Fuel efficiency gains over heavier grade oils
  • Reduces oil cumsumption
  • Excellent sludge and varnish protection
  • Slows engine leaks
  • Outstanding thermal and oxidation stability
  • Lowers oil vaporization and consumption at extreme conditions
  • Always refer to your vehicles operating manual to select the correct grade oil for your engine.
See More

FRAM – 30W Small Engine 30W Conventional Oil: 1 Quart (Part No.463-32)

30W Small Engine 30W Conventional Oil: 1 Quart

from

$7.29
30W Small Engine 30W Conventional Oil: 1 Quart

Castrol – GTX Ultraclean 5W-30 Synthetic Blend Motor Oil: 5 Quart (Part No.15A66D)

GTX Ultraclean 5W-30 Synthetic Blend Motor Oil: 5 Quart

from

$29.99
Environmental factors such as poor fuel quality, hot weather and stop-start driving conditions can lead to sludge, varnish and carbon build-up in your engine: three factors that reduce engine life, power and fuel economy. Castrol Ultraclean is a synthetic blend engine oil available in 0W-20, 5W-20 and 5W-30 grades. Its double-action formula has been proven to clean away the sludge that can block engine oilways* and helps prevent new sludge formation thanks to its synthetic technology. In fact, it provides up to 1.4X better sludge protection than is demanded by the latest industry standard. If keeping your engine clean is important to you, it’s good to know that no other oil keeps engines cleaner.

Product Features:
  • 1.4X superior sludge protection compared to tough industry standards (As measured in the Sequence VH Sludge test vs. API SP test limits)
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against high-temperature deposits
  • Premium-quality base oils and anti-wear additives that help extend the life of your engine
  • Double-Action Formula: The synthetic blend engine oil features a double-action formula that effectively cleans away existing sludge and prevents new sludge formation.
  • Versatile Grade Options: Available in 0W-20, 5W-20, and 5W-30 grades, Castrol Ultraclean offers flexibility to suit various engine requirements.
  • Enhanced Engine Performance: By reducing sludge, varnish, and carbon build-up, this oil helps improve engine life, power, and fuel economy.
  • Synthetic Blend Composition: The GTX Ultraclean 5W-30 Synthetic Blend Motor Oil combines the benefits of synthetic technology with the reliability of a standard oil class.
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Castrol – GTX Ultraclean 5W-30 Synthetic Blend Motor Oil: No Oil Keeps Engines Cleaner, 1 Quart (Part No.15A66C)

GTX Ultraclean 5W-30 Synthetic Blend Motor Oil: No Oil Keeps Engines Cleaner, 1 Quart

from

$9.99
Castrol® Ultraclean synthetic blend engine oil is our cleanest GTX ever. Environmental factors such as poor fuel quality, hot weather and stop-start driving conditions can lead to the buildup of sludge that can reduce engine life, power and fuel economy. Castrol Ultraclean has a double-action formula proven to clean away the sludge that can block engine oilways and helps prevent new sludge formation from occurring. In fact, it provides up to 1.4X better sludge protection than is demanded by the latest industry standard (as measured in the Sequence VH Sludge test vs. API SP test limits). No other oil keeps engines cleaner.

Product Features:
  • Premium-quality base oils and anti-wear additives that help extend the life of your engine
  • 1.4X superior sludge protection compared to tough industry standards, as measured in the Sequence VH Sludge test vs. API SP test limits
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against high-temperature deposits
  • Meets or exceeds API SP/SN PLUS/SN, ILSAC GF-6 and latest Ford specs
  • Double-Action Formula: Castrol Ultraclean’s unique double-action formula effectively cleans away existing sludge and prevents new sludge formation, ensuring optimal engine performance.
  • Enhanced Engine Life and Performance: Designed to combat environmental factors like poor fuel quality, hot weather, and stop-start driving conditions, which can reduce engine life, power, and fuel economy.
  • Synthetic Blend Composition: Combines the benefits of synthetic and conventional oils, offering superior protection and performance in a 5W-30 SAE oil weight.
  • Cleanest GTX Ever: Marketed as Castrol’s cleanest GTX oil, ensuring that no other oil keeps engines cleaner, making it an ideal choice for maintaining engine cleanliness and efficiency.
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Castrol – EDGE 5W-20 Full Synthetic Engine Oil 1 Quart (Part No.152C82)

EDGE 5W-20 Full Synthetic Engine Oil 1 Quart

from

$11.99
CASTROL EDGE 5W-20 Full Synthetic Motor Oil 1 Quart is the perfect choice for drivers who want the best engine performance. This oil is Castrol’s strongest oil, formulated with Fluid TITANIUM Technology, which provides maximum sludge protection, wear protection, and engine performance. It is 3X stronger against viscosity breakdown than traditional oils, 10X better in high-temperature performance, and 6X better in wear protection. This oil meets API SP/SN PLUS, ILSAC GF-6, ACEA A1/B1, and other industry standards. It is a full synthetic oil with an SAE weight of 5W-20, which means it is suitable for use in most modern engines. With Castrol EDGE, you can unlock maximum performance with every drive.

Product Features:
  • 3x stronger against viscosity breakdown than the leading full synthetic – based on kurt orbahn test in 5W-30 grade
  • 10x better high temperature performance – as measured in seq iiih engine test vs. api sp limit
  • 6x better wear protection – as measured in seq iva test vs. latest test limit
  • Meets api sp/sn plus, ilsac gf-6, acea a1/b1, acea c5, gm dexos1 gen 2, meets ford wss-m2c960-a1 and wss-m2c945-b1, meets engine test requirements of chrysler ms 6395
  • Syntec Power Technology: The reformulated EDGE Engine Oil with Syntec Power Technology provides even better performance, making it the perfect choice for drivers who demand the best from their engines.
  • Full Synthetic Oil Composition: The oil composition of EDGE Engine Oil is full synthetic, providing superior protection against sludge buildup and wear, ensuring maximum engine performance.
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Mobil 1 – Truck & SUV 5W-30 Full Synthetic Motor Oil, 1 Quart (Part No.14988)

Truck & SUV 5W-30 Full Synthetic Motor Oil, 1 Quart

from

$11.99
You count on your gas-powered truck or SUV for more than just transportation. For a motor oil that works as hard as you do, you can trust Mobil 1 Truck & SUV full-synthetic motor oil 5W-30. Mobil 1 Truck & SUV utilizes Mobil 1’s signature Triple Action Formula to deliver outstanding engine protection and cleanliness to your engine for up to 10,000 miles between oil changes, (1) and proven performance in a 10,000 lb. towing test. (2) Mobil 1 Truck & SUV full-synthetic motor oil 5W-30 is also 10% more resistant to oil breakdown (3) and meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean and helping your fuel economy. Mobil 1 is America’s No. 1 selling synthetic motor oil brand at retail, (4) trusted recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR. ( (1) Protects for up to 10,000 miles or 1 year, whichever comes first. To learn more about the Mobil 1 Limited Warranty, visit Mobil.US. (2) Please reference your vehicle owner’s manual for information on your engine’s maximum towing / hauling capacity. (3) Versus leading synthetic competitors in proprietary oxidation test. (4) Source: The NPD Group/ Retail Tracking Service/ Dollar Sales/ PCMO full-synthetic/ 52 weeks ending July 1, 2023)

Product Features:
  • Mobil 1 Truck & SUV advanced full-synthetic motor oil 5W-30 is specially formulated for hardworking trucks and SUVs that operate in tough conditions like towing and hauling.
  • Helps protect critical engine parts for up to 10,000 miles between oil changes,(1) controlling oxidation to prevent oil breakdown and maintaining excellent viscosity
  • Utilizes Mobil 1’s signature Triple Action Formula to deliver outstanding engine protection, cleanliness, and proven performance in a 10,000 lb. towing test(2)
  • Additives that help prevent deposit formation
  • Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -40 degrees F)
  • Keeps your engine running like new by providing unsurpassed wear protection
  • Manufacturer Part Number: 124599
  • Superior Oil Breakdown Resistance: This motor oil is 10% more resistant to oil breakdown compared to leading synthetic competitors, ensuring longer-lasting engine protection.
  • Meets ILSAC GF-6 Standards: Mobil 1 Truck & SUV full-synthetic motor oil 5W-30 meets ILSAC GF-6 standards, providing low-speed pre-ignition (LSPI) and timing chain wear protection while helping to improve fuel economy.
  • Trusted Brand: Mobil 1 is America’s No. 1 synthetic motor oil brand at retail, trusted and recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR«.
  • Trusted Brand: Mobil 1 is America’s No. 1 synthetic motor oil brand at retail, trusted and recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR®.
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FRAM – Conventional 5W20 Engine Oil, with Low-Speed Pre-Ignition Control 1 Quart (Part No.F610)

Conventional 5W20 Engine Oil, with Low-Speed Pre-Ignition Control 1 Quart

from

$6.49
FRAM Engine Oil SAE 5W-20 utilizes a blend of high-quality conventional and synthetic base stocks coupled with a robust additive system to provide reliable engine protection across a broad range of operating conditions. Specifically formulated for use in modern gas-direct engines (GDI) and turbo gas-direct engines (TGDI) as well as older carbureted or normally fuel injected gasoline engine designs. FRAM Engine Oil SAE 5W-20 contains additive technology designed to prevent low-speed pre-ignition (LSPI) while also providing increased wear protection, oxidation and shear stability over previous oil categories. FRAM Engine Oil SAE 5W-20 meets the requirements for API SP, SN Plus, SN, SM and ILSAC GF-6A, GF-5 and earlier API and ILSAC Service Categories.

Product Features:
  • Low-speed pre-ignition control
  • Chain wear protection
  • Piston cleanliness
  • Turbo-compatibility
  • Always refer to your vehicles operating manual to select the correct grade oil for your engine.
  • Reliable engine protection: FRAM Conventional Oil 5W20 1 QT utilizes a blend of high-quality conventional and synthetic base stocks coupled with a robust additive system to provide reliable engine protection across a broad range of operating conditions.
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Castrol – EDGE Extended Performance 5W-20 Advanced Full Synthetic Motor Oil: 5 Qt (Part No.1598EF)

EDGE Extended Performance 5W-20 Advanced Full Synthetic Motor Oil: 5 Qt

from

$41.99
Castrol EDGE Extended Performance with Fluid TITANIUM Technology is Castrol’s most advanced full synthetic and the natural choice for drivers who demand outstanding performance and the assurance of protection during today’s longer drain intervals. It provides protection for 20,000 miles or a full year – guaranteed. Castrol EDGE Extended Performance features some of the best attributes of Castrol’s patented Fluid TITANIUM Technology that transforms its structure to be stronger under pressure. It helps keep metal apart to fight power-robbing friction, providing wear protection 6X better than required by the industry standard, while protecting under extreme conditions with 10X better high temperature performance.  Castrol EDGE Extended Performance provides the strength to extend drains for 20,000 miles and the muscle to maintain viscosity stability under the extreme force of the engine and protection from wear.  Unlock maximum engine performance.

Product Features:
  • Extended drain interval of 20,000 miles or a full year (Whichever comes first)
  • 10X Better High Temperature performance (As measured in Sequence IIIH engine test vs. API SP test limit)
  • 6X Better Wear Protection (As measured in the latest Sequence IVA engine test)
  • 1.4X Better Sludge Protection (As measured in Sequence VH engine test vs. API SP test limit)
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FRAM – Conventional 5W30 Engine Oil with Low-Speed Pre-Ignition Control – 1 Qt (Part No.F620)

Conventional 5W30 Engine Oil with Low-Speed Pre-Ignition Control - 1 Qt

from

$6.49
FRAM Engine Oil SAE 5W-30 utilizes a blend of high-quality conventional and synthetic base stocks coupled with a robust additive system to provide reliable engine protection across a broad range of operating conditions. Specifically formulated for use in modern gas-direct engines (GDI) and turbo gas-direct engines (TGDI) as well as older carbureted or normally fuel injected gasoline engine designs. FRAM Engine Oil SAE 5W-30 contains additive technology designed to prevent low-speed pre-ignition (LSPI) while also providing increased wear protection, oxidation and shear stability over previous oil categories. FRAM Engine Oil SAE 5W-30 meets the requirements for API SP, SN Plus, SN, SM and ILSAC GF-6A, GF-5 and earlier API and ILSAC Service Categories.

Product Features:
  • Low-speed pre-ignition control
  • Chain wear protection
  • Piston cleanliness
  • Turbo-compatibility
  • Always refer to your vehicles operating manual to select the correct grade oil for your engine.
  • Reliable engine protection: FRAM Conventional Oil 5W30 1 QT utilizes a blend of high-quality conventional and synthetic base stocks coupled with a robust additive system to provide reliable engine protection across a broad range of operating conditions.
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FRAM – 5 Qt Conventional 5W20 Engine Oil with Low-Speed Pre-Ignition Control (Part No.F610-5QT)

5 Qt Conventional 5W20 Engine Oil with Low-Speed Pre-Ignition Control

from

$25.99
FRAM Engine Oil SAE 5W-20 utilizes a blend of high-quality conventional and synthetic base stocks coupled with a robust additive system to provide reliable engine protection across a broad range of operating conditions. Specifically formulated for use in modern gas-direct engines (GDI) and turbo gas-direct engines (TGDI) as well as older carbureted or normally fuel injected gasoline engine designs. FRAM Engine Oil SAE 5W-20 contains additive technology designed to prevent low-speed pre-ignition (LSPI) while also providing increased wear protection, oxidation and shear stability over previous oil categories. FRAM Engine Oil SAE 5W-20 meets the requirements for API SP, SN Plus, SN, SM and ILSAC GF-6A, GF-5 and earlier API and ILSAC Service Categories.

Product Features:
  • Low-speed pre-ignition control
  • Chain wear protection
  • Piston cleanliness
  • Turbo-compatibility
  • Always refer to your vehicles operating manual to select the correct grade oil for your engine.
  • Reliable engine protection: FRAM Conventional Oil 5W20 5 QT utilizes a blend of high-quality conventional and synthetic base stocks coupled with a robust additive system to provide reliable engine protection across a broad range of operating conditions.
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FRAM – 10W40 Conventional Motor Oil, with Low-Speed Pre-Ignition Control, 1 Quart (Part No.F640)

10W40 Conventional Motor Oil, with Low-Speed Pre-Ignition Control, 1 Quart

from

$6.49
FRAM Engine Oil SAE 10W-40 engine oil utilizes high-quality base stocks and a robust  additive system to provide reliable engine protection across a broad range of operating  conditions. Specifically formulated for use in modern gas-direct engines (GDI) and turbo gas direct engines (TGDI) as well as older carbureted or normally fuel injected gasoline engine  designs. FRAM Engine Oil SAE 10W-40 contains additive technology designed to prevent  low-speed pre-ignition (LSPI) while also providing increased wear protection, oxidation and  shear stability over previous oil categories. The FRAM Engine Oil SAE 10W-40 meets the  requirements for API SP, SN Plus, SN, SM and earlier API Service Categories.

Product Features:
  • Low-speed pre-ignition control
  • Chain wear protection
  • Piston cleanliness
  • Turbo-compatibility
  • Low-speed pre-ignition control
  • Chain wear protection
  • Piston cleanliness
  • Turbo-compatibility
  • Always refer to your vehicles operating manual to select the correct grade oil for your engine.
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Castrol – GTX Magnatec 10W-30 Synthetic Blend Motor Oil (1 Quart) (Part No.15B0B4)

GTX Magnatec 10W-30 Synthetic Blend Motor Oil (1 Quart)

from

$9.49
The intelligent molecules in Castrol GTX MAGNATEC are what set it apart from other engine oils. These ultra-refined molecular components cling to the engine throughout all driving conditions, even when the engine is off. When the engine stops, oil drains back to the sump, but the intelligent molecules in Castrol GTX MAGNATEC don’t. They cling to critical engine parts like a magnet, providing an extra layer of protection from the start and throughout warm-up. Only Castrol GTX Magnatec is uniquely formulated to provide instant protection from the moment of start.

Product Features:
  • Cling to critical engine parts when the oil drains down
  • Add a layer of protection during warm-up and beyond
  • Dramatically reduce engine wear
  • Leave critical engine parts 4X smoother
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Castrol – GTX High Mileage 5W-30 Synthetic Blend Engine Oil: 5 Quart (Part No.15980E)

GTX High Mileage 5W-30 Synthetic Blend Engine Oil: 5 Quart

from

$30.99
Castrol GTX High Mileage motor oil is the leading consumer high-mileage brand. You won’t need to worry about using a high mileage oil or synthetic because this is both. It’s a synthetic blend engine oil that helps extend the life of your engine by protecting against sludge, wear and burn-off and also liquid engineered to protect your emission system. One of the leading causes of ‘check engine’ lights coming on in high mileage cars is actually catalytic converter failure, which can be caused by phosphorous in engine oil. While phosphorous is present in all engine oils for its ability to reduce wear, it is effectively poisonous to catalytic converters. Castrol GTX High Mileage Motor Oil is liquid engineered with Phosphorous Replacement Technology to replace some of the phosphorous with an advanced additive that maintains robust wear protection. When you want to extend the life of your high mileage engine and emission system and find out how many miles you can go on a high-mileage oil, there is no better choice than Castrol GTX High Mileage Motor Oil.

Product Features:
  • Phosphorus replacement technology to help extend the life of the emission system
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (based on api and acea volatility specifications)
  • Improved fuel economy (in 5w-20, 5w-30 and 10w-30 grades versus industry specifications)
  • Provides extra protection for older vehicles: Castrol GTX High Mileage Engine Oil is specifically designed to provide extra protection for high mileage engines, helping to extend the life of your vehicle.
  • Synthetic blend composition: This engine oil is a synthetic blend, combining the benefits of both conventional and synthetic oils to provide superior protection against sludge, wear, and burn-off.
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FRAM – 20W-50 Conventional Motor Oil, Reliable Engine Protection, 1 Quart (Part No.F650)

20W-50 Conventional Motor Oil, Reliable Engine Protection, 1 Quart

from

$6.49
FRAM Engine Oil SAE 20W-50 utilizes a blend of high-quality conventional base stocks coupled with a robust additive system to provide reliable engine protection across a broad range of operating conditions. Specifically formulated for use in modern gas-direct engines (GDI) and turbo gas-direct engines (TGDI) as well as older carbureted or normally fuel injected gasoline engine designs. FRAM Engine Oil SAE 20W-50 contains additive technology designed to prevent low-speed pre-ignition (LSPI) while also providing increased wear protection, oxidation and shear stability over previous oil categories. FRAM Engine Oil SAE 20W-50 meets the requirements for API SP, SN Plus, SN, SM and ILSAC GF-6A, GF-5 and earlier API and ILSAC Service Categories.

Product Features:
  • Low-Speed Pre-Ignition Control
  • Chain Wear Protection
  • Piston Cleanliness
  • Turbo-Compatibility
  • ALWAYS REFER TO YOUR VEHICLES OPERATING MANUAL TO SELECT THE CORRECT GRADE OIL FOR YOUR ENGINE.
  • High-Quality Conventional Base Stocks: FRAM Engine Oil SAE 20W-50 utilizes a blend of high-quality conventional base stocks for reliable engine protection.
  • Versatile Compatibility: Suitable for modern gas-direct engines (GDI), turbo gas-direct engines (TGDI), and older carbureted or normally fuel-injected gasoline engine designs.
  • Meets Industry Standards: Complies with API SP, SN Plus, SN, SM, and ILSAC GF-6A, GF-5, and earlier API and ILSAC Service Categories.
  • Broad Operating Range: Designed to provide reliable engine protection across a broad range of operating conditions.
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Castrol – EDGE 10W-30 Full Synthetic Motor Oil, 5 Quart (Part No.1598B6)

EDGE 10W-30 Full Synthetic Motor Oil, 5 Quart

from

$37.99
Castrol EDGE 10W-30 Full Synthetic Motor Oil is Castrol’s strongest oil, ideal for drivers seeking the best in sludge protection, wear protection, and maximum engine performance. This oil is 3X stronger against viscosity breakdown than the leading full synthetic, 10X better in high-temperature performance, and offers 6X better wear protection. It meets API SP/SN PLUS, ILSAC GF-6, ACEA A1/B1, GM 6094M, and 4718M standards, and fulfills the engine test requirements of Chrysler MS 6395, ensuring top-tier performance and reliability. Unlock maximum performance with every drive.

Product Features:
  • 3X Stronger against viscosity breakdown than the leading full synthetic – Based on Kurt Orbahn test in 5W-30 grade
  • 10X Better High Temperature performance – As measured in Seq IIIH engine test vs. API SP limit
  • 6X Better Wear Protection – As measured in Seq IVA test vs. latest test limit
  • Meets API SP/SN PLUS, ILSAC GF-6, ACEA A1/B1, GM 6094M and 4718M, Meets engine test requirements of Chrysler MS 6395
  • Advanced Fluid TITANIUM Technology: Incorporates Fluid TITANIUM Technology, making it Castrol’s strongest oil for drivers who demand the best in sludge protection, wear protection, and maximum engine performance.
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1981 Chevrolet K20 Motor Oil

Maybe you’re in the middle of a full rebuild of that 1981 Chevrolet K20. Maybe you just need a couple of Motor Oil. Either way, Advance Auto Parts has 72 different Motor Oil in our inventory ranging from $6.49 to $41.99. That means you can find the exact parts or products you need to keep that 1981 Chevrolet K20 running smoothly.

Motor Oil are only as good as their brand. We stock 5 different brands to make sure you have plenty of trusted parts to choose from for your 1981 Chevrolet K20. Castrol, Fram, and Mobil Oil are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Motor Oil for your 1981 Chevrolet K20, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 128,280 reviews in this category, some of the top rated parts include Advanced Full Synthetic 10W-30 Motor Oil: Maximizes Engine Life, 5 Quart with 4.9 stars and Advanced Full Synthetic 10W-30 Motor Oil: Maximizes Engine Life, 1 Quart with 4.9 stars.

So if you’re in the market for aftermarket Motor Oil to keep your 1981 Chevrolet K20 rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Motor Oil Brands To Make Your 1981 Chevrolet K20 Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1981 Chevrolet K20 demands trusted brand parts and products to keep it running. Many trusted brands of Motor Oil make up Advance Auto Parts’ inventory, and all are ready to help make your K20 the best it can be. Be sure to browse some of our top Motor Oil brands and parts.

FAQs for 1981 Chevrolet K20 Motor Oil

What are the most purchased Motor Oil for the 1981 Chevrolet K20?

Out of 72 Motor Oil for the 1981 Chevrolet K20, the most popular in our inventory are:
Full Synthetic 5W-30 Dexos1 Gen 3 Engine Oil: 5 Quart
from $27.99
This product is not rated
Full Synthetic 5W-30 Dexos1 Gen 3 Engine Oil: 5 Quart
Engine Oil

What are the top-rated 1981 Chevrolet K20 Motor Oil?

Top-rated Motor Oil for your 1981 Chevrolet K20 based on customer reviews/ratings are:
Advanced Full Synthetic 10W-30 Motor Oil: Maximizes Engine Life, 1 Quart
from $11.49
(690)
Advanced Full Synthetic 10W-30 Motor Oil: Maximizes Engine Life, 1 Quart
“I have always used Valvoline oil with very good luck so to find it at a very good price that’s great.”
EDGE 5W-30 Advanced Full Synthetic Motor Oil: 1 Quart
from $11.99
(442)
EDGE 5W-30 Advanced Full Synthetic Motor Oil: 1 Quart
“all my cars”