1998 Audi A8 Engine Oil

Your 1998 Audi A8 might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Engine Oil you desperately need.

We currently carry 72 Engine Oil to choose from for your 1998 Audi A8, and our inventory prices range from as little as $5.89 up to $114.99.

On top of low prices, Advance Auto Parts offers 8 different trusted brands of Engine Oil for the 1998 Audi A8. We only sell parts from trusted brands like Castrol so that you can find quality parts you can count on.

Don’t take our word for it – check out customer ratings and reviews to buy with confidence. We have 9,893 reviews on our Engine Oil for the 1998 Audi A8 from previous customers.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Engine Oil stock in-person!

Engine Oil for Your 1998 Audi A8

Castrol – EDGE High Mileage 5W-30 Advanced Full Synthetic Engine Oil: 5 Qt (Part No.15906E)

EDGE High Mileage 5W-30 Advanced Full Synthetic Engine Oil: 5 Qt

from

$38.99
Castrol EDGE High Mileage with Fluid TITANIUM Technology is the natural choice for drivers who demand maximum performance from their high mileage cars, which often operate at extreme temperatures. Castrol EDGE High Mileage provides up to 10X better high temperature performance than the latest industry standard to ensure optimal protection and oil flow over the drive cycle. As your car ages, it can lose performance and efficiency and is also more prone to catalytic converter failure. Castrol EDGE High Mileage is liquid engineered with Phosphorous Replacement Technology to reduce harmful phosphorus to protect the catalytic converter and preserve the life of your emission system. Castrol EDGE High Mileage helps your car defy its miles and extend maximum performance.

Product Features:
  • Patented phosphorus replacement technology to help extend the life of your emission system
  • 10x better high temperature performance (as measured in sequence iiih engine test vs. api sp test limit)
  • 6x better wear protection (as measured in latest sequence iva engine test)
  • 1.4x better sludge protection (as measured in sequence vh engine test vs. api sp test limit)
  • Maximum Performance: Castrol EDGE High Mileage with Fluid TITANIUM Technology is designed to provide maximum performance for high mileage cars, even in extreme temperatures.
  • Protects Catalytic Converter: Castrol EDGE High Mileage is liquid engineered with Phosphorous Replacement Technology to reduce harmful phosphorus, protecting the catalytic converter and preserving the life of your emission system.
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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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Castrol – EDGE Euro Car 5W-40 A3/B4 Full Synthetic Engine Oil 5 Quart (Part No.15B6FE)

EDGE Euro Car 5W-40 A3/B4 Full Synthetic Engine Oil 5 Quart

from

$37.99
CASTROL EDGE Euro Car 5W-40 A3/B4 Full Synthetic Motor Oil is a high-performance motor oil that is designed to provide superior engine protection and performance. This full-synthetic motor oil is optimized to deliver 40% better performance than other synthetic oils and is recommended by leading auto manufacturers. It provides engine protection for the entire drain interval and meets API CF/SN, ACEA A3/B4, BMW LL 01, MB Approval 229.5/226.5, and VW 502 00/505 00 specifications. This motor oil is 10x stronger against high-temperature oil thickening and helps improve fuel economy. It is formulated for the latest technology, high-output engines that operate at extreme temperatures and covers European OEM gasoline specifications for BMW, Mercedes-Benz, Porsche, and VW/Audi.

Product Features:
  • Optimized to deliver 40% better performance than required by acea standards
  • Recommended by world leading auto manufacturers
  • Engine protection for the entire drain interval even under extreme pressure of high output engines
  • Meets api cf/sn, acea a3/b4, bmw ll 01, mb approval 229.3/229.5, porsche a40, vw 502 00/505 00, renault rn 0700/0710
  • 10x stronger against high temperature oil thickening vs. industry standards(seq iiih vs api sn plus limits)
  • Helps improve fuel economy
  • Exceeds: acea a3/b4. api sn/cf, bmw longlife-01, mb-approval 229.3, porsche a40, vw 502 00 / 505 00
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Mobil 1 – FS European Car Formula Full Synthetic Engine Oil 0W-40, 5 Quart (Part No.54526)

FS European Car Formula Full Synthetic Engine Oil 0W-40, 5 Quart

from

$37.99
Mobil 1 FS European Car Formula 0W-40 helps to extend engine life, even in severe conditions, and protects critical engine parts for up to 10,000 miles between oil changes (1) . Its uniform synthetic oil molecules reduce friction, helping to prevent deposits and sludge buildup. This technologically advanced formulation provides excellent internal engine heat protection (up to 500 degrees Fahrenheit), and low-temperature protection (to -40 degrees Fahrenheit), supporting quick cold-weather starting and ultra-fast protection. Mobil 1 FS European Car Formula 0W-40 also helps control oxidation to prevent oil breakdown. Approved for many Mercedes-Benz, VW, Audi and Porsche vehicles, this formula provides excellent turbocharged engine protection. Mobil 1 is America’s leading synthetic motor oil brand at retail (2) , recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR. ( (1) Protects for 10,000 miles or 1 year, whichever comes first. To learn more about the Mobil 1 Limited Warranty, visit Mobil.US. (2) Source: The NPD Group/ Retail Tracking Service/ Dollar Sales/ PCMO Full Synthetic/ 52 weeks ending February 25, 2023)

Product Features:
  • Mobil 1 fs european car formula full synthetic engine oil 0w-40 helps to extend engine life even in severe conditions
  • Helps to control oxidation to prevent oil breakdown and maintain excellent viscosity for up to 10,000 miles between oil changes(1)
  • Provides outstanding engine wear protection and performance with uniform synthetic oil molecules for better friction reduction
  • Keeps your engine running like new by working to prevent damaging deposits and sludge buildup
  • Provides excellent internal engine heat protection (up to 500 degrees f ) and low temperature protection (up to -40 degrees f )
  • Manufacturer part number: 120760
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Castrol – EDGE 5W-30 Advanced Full Synthetic Engine Oil: 5 Quart (Part No.1598B1)

EDGE 5W-30 Advanced Full Synthetic Engine Oil: 5 Quart

from

$37.99
Castrol EDGE with Fluid TITANIUM Technology is Castrol’s strongest oil and the natural choice for drivers who want the best combination of sludge protection, wear protection and maximum engine performance. Unlock maximum performance with every drive. Today’s engines are smaller, more powerful and under more pressure than ever before. Castrol EDGE has been engineered to withstand the stress of modern engines and provides 10X better high temperature performance than the latest industry standard. Did you know that friction can waste up to 10% of an engine’s performance? Increased demands placed on the engine to deliver power and fuel efficiency create intense friction between critical engine parts. Castrol EDGE transforms its structure under pressure to keep metal apart and reduce friction for maximum engine performance and delivers 6X better wear protection than required by the latest Sequence IVA test limits.

Product Features:
  • 3x stronger against viscosity breakdown than leading full synthetic (based on kurt orbahn test in 5W-30 grade)
  • 10x better high temperature performance (as measured in sequence iiih engine test vs. api sp test limit)
  • 6x better wear protection
  • 1.4x better sludge protection (as measured in sequence vh engine test vs. api sp test limit)
  • Full Synthetic Oil Composition: Castrol EDGE w/SPT Engine Oil is a full synthetic oil that contains new powerful dispersant molecules, providing superior engine protection and performance.
  • Strongest Oil: Castrol EDGE with Fluid TITANIUM Technology is Castrol’s strongest oil, providing the best combination of sludge protection, wear protection, and maximum engine performance.
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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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Castrol – EDGE 5W-30 Advanced Full Synthetic Motor Oil: 1 Quart (Part No.152C3C)

EDGE 5W-30 Advanced Full Synthetic Motor Oil: 1 Quart

from

$11.99
Castrol EDGE with Fluid TITANIUM Technology is Castrol’s strongest oil and the natural choice for drivers who want the best combination of sludge protection, wear protection and maximum engine performance. Unlock maximum performance with every drive. Today’s engines are smaller, more powerful and under more pressure than ever before. Castrol EDGE has been engineered to withstand the stress of modern engines and provides 10X better high temperature performance than the latest industry standard. Did you know that friction can waste up to 10% of an engine’s performance? Increased demands placed on the engine to deliver power and fuel efficiency create intense friction between critical engine parts. Castrol EDGE transforms its structure under pressure to keep metal apart and reduce friction for maximum engine performance and delivers 6X better wear protection than required by the latest Sequence IVA test limits.

Product Features:
  • 3X Stronger against viscosity breakdown than leading full synthetic (Based on Kurt Orbahn test in 5W-30 grade)
  • 10X Better High Temperature performance (As measured in Sequence IIIH engine test vs. API SP test limit)
  • 6X Better Wear Protection
  • 1.4X Better Sludge Protection (As measured in Sequence VH engine test vs. API SP test limit)
  • Advanced Friction Reduction: Transforms its structure under pressure to keep metal parts apart, reducing friction and unlocking maximum engine performance, which can help prevent up to 10% performance loss due to friction.
  • Engineered for Modern Engines: Specially designed to withstand the stress of today’s smaller, more powerful engines, ensuring optimal performance and protection under increased pressure and demands.
  • Full Synthetic Composition: As a full synthetic motor oil with a 5W-30 SAE oil weight, Castrol EDGE offers superior protection and performance, making it the natural choice for drivers seeking the best for their vehicles.
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Mobil 1 – FS European Car Formula 0W-40 Full Synthetic Motor Oil, 1 Quart (Part No.44962)

FS European Car Formula 0W-40 Full Synthetic Motor Oil, 1 Quart

from

$11.99
Mobil 1 FS European Car Formula 0W-40 helps to extend engine life, even in severe conditions, and protects critical engine parts for up to 10,000 miles between oil changes (1) . Its uniform synthetic oil molecules reduce friction, helping to prevent deposits and sludge buildup. This technologically advanced formulation provides excellent internal engine heat protection (up to 500 degrees Fahrenheit), and low-temperature protection (to -40 degrees Fahrenheit), supporting quick cold-weather starting and ultra-fast protection. Mobil 1 FS European Car Formula 0W-40 also helps control oxidation to prevent oil breakdown. Approved for many Mercedes-Benz, VW, Audi and Porsche vehicles, this formula provides excellent turbocharged engine protection. Mobil 1 is America’s leading synthetic motor oil brand at retail (2) , recommended by car builders and experienced mechanics, and is the Official Motor Oil of NASCAR. ( (1) Protects for 10,000 miles or 1 year, whichever comes first. To learn more about the Mobil 1 Limited Warranty, visit Mobil.US. (2) Source: The NPD Group/ Retail Tracking Service/ Dollar Sales/ PCMO Full Synthetic/ 52 weeks ending July 1, 2023)

Product Features:
  • Mobil 1 FS European Car Formula full synthetic motor oil 0W-40 helps to extend engine life even in severe conditions
  • Helps to control oxidation to prevent oil breakdown and maintain excellent viscosity for up to 10,000 miles between oil changes(1)
  • Provides outstanding engine wear protection and performance with uniform synthetic oil molecules for better friction reduction
  • Keeps your engine running like new by working to prevent damaging deposits and sludge buildup
  • Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (up to -40 degrees F)
  • Manufacturer Part Number: 112628
  • Turbocharged Engine Protection: Approved for many Mercedes-Benz, VW, Audi, and Porsche vehicles, this formula offers excellent protection for turbocharged engines.
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Castrol – EDGE Euro Car 5W-40 A3/B4 Full Synthetic Engine Oil 1 Quart (Part No.152C7E)

EDGE Euro Car 5W-40 A3/B4 Full Synthetic Engine Oil 1 Quart

from

$12.49
CASTROL EDGE Euro Car 5W-40 A3/B4 Full Synthetic Motor Oil is a high-performance engine oil that is specifically designed for the latest technology, high output engines that operate at extreme temperatures. This full-synthetic motor oil is formulated to deliver 40% better performance than other motor oils, and it is recommended by world-leading auto manufacturers. It provides engine protection for the entire drain interval and meets API CF/SN, ACEA A3/B4, BMW LL 01, MB Approval 229.5/226.5, and Porsche A40 specifications. This motor oil is Porsche-approved except for Cayenne V6 and MB-Approved 229.5. It transforms under pressure, increasing film strength to prevent oil breakdown and reduce friction to unlock maximum performance. This fluid covers European OEM gasoline specifications for BMW, Mercedes-Benz, Porsche, and VW/Audi.

Product Features:
  • Optimized to deliver 40% better performance than required by acea standards
  • Recommended by world leading auto manufacturers
  • Engine protection for the entire drain interval even under extreme pressure of high output engines
  • Meets api cf/sn, acea a3/b4, bmw ll 01, mb approval 229.3/229.5, porsche a40, vw 502 00/505 00, renault rn 0700/0710
  • Porsche-approved except cayenne v6; mb-approval 229.3
  • SYNTEC Technology: The reformulated EDGE Engine Oil features SYNTEC Technology, which enhances its performance and provides even better protection for your engine.
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Castrol – EDGE High Mileage 5W-30 Full Synthetic Engine Oil 1 Quart (Part No.15979F)

EDGE High Mileage 5W-30 Full Synthetic Engine Oil 1 Quart

from

$12.99
CASTROL EDGE High Mileage 5W-30 Full Synthetic Motor Oil 1 Quart is the perfect choice for vehicles with over 75K miles. It is formulated with Fluid Titanium Technology that provides 10X better high-temperature performance and 6X better wear protection. The oil is designed with Phosphorus Replacement Technology that preserves the catalytic converter and the emission system. It meets API SP/SN PLUS, ILSAC GF-6, GM dexos1 Gen 2, and other OEM specifications. Castrol EDGE High Mileage is a full synthetic motor oil that offers superior performance and protection for high mileage engines. It is available in different grades, including 5W-20, 5W-30, and 10W-30. Try Castrol EDGE High Mileage today and extend the life of your engine.

Product Features:
  • 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
  • From the makers of the No. 1 high mileage brand
  • Meets api sp/sn plus, ilsac gf-6, gm dexos1 gen 2, meets ford wss-m2c961-a1 and wss-m2c946-b1, meets engine test requirements of chrysler ms 6395 and 13340
  • Castrol edge offers engine oils that meet oem specification approvals or licenses that cover over 97.3% of the us car parc.
  • Available in the following grades: 5w-20, 5w-30, 10w-30, and 10w-40
  • Try castrol edge high mileage today
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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 High Mileage Synthetic Blend 5W-30 Engine Oil: Helps Protect Emission Systems, 1 Quart (Part No.149D6A)

GTX High Mileage Synthetic Blend 5W-30 Engine 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
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Castrol – GTX 10W-30 Conventional Motor Oil, Helps Extend Engine Life, 5 Quart (Part No.15B7AA)

GTX 10W-30 Conventional Motor Oil, Helps Extend Engine Life, 5 Quart

from

$29.99
Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life. Castrol GTX is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It has evolved to meet the needs of consumers and vehicle manufacturers since 1968 and continues to innovate and remain a trusted brand today. Severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals can all cause the build-up of a thick, tar like substance called sludge. If untreated, it can rob a car’s engine of its power and ultimately its life. GTX is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Help Extend the Life of Your Engine with Castrol GTX.

Product Features:
  • Superior protection against engine sludge (When tested in engines with a high level of sludge)
  • Advanced protection against viscosity and thermal breakdown
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Helps minimize oil consumption
  • Proven Longevity: With over 50 years of innovation and trust, Castrol GTX helps extend the life of your engine by protecting against new oil splatter formation better than tough industry standards.
  • Adaptable to Severe Conditions: Designed to perform under severe driving conditions such as heavy traffic, poor fuel quality, and harsh driving environments, ensuring your engine remains powerful and reliable.
  • Premium Conventional Oil: As a premium conventional motor oil, Castrol GTX meets the needs of both consumers and vehicle manufacturers, providing reliable performance and protection.
  • Optimal Viscosity: Featuring an SAE oil weight of 10W-30, Castrol GTX offers optimal viscosity for a wide range of temperatures, ensuring smooth engine operation and protection.
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Castrol – EDGE Euro Car A3/B4 5W-30 Full Synthetic Motor Oil, 1 Quart (Part No.15484E)

EDGE Euro Car A3/B4 5W-30 Full Synthetic Motor Oil, 1 Quart

from

$12.49
Castrol EDGE Euro Car 5W-30 A3/B4 Full Synthetic Motor Oil transforms under pressure, increasing film strength to prevent oil breakdown and reduce friction, unlocking maximum performance. Optimized to deliver 40% better performance than required by ACEA standards, it is recommended by world-leading auto manufacturers. This full-synthetic oil provides engine protection for the entire drain interval, even under the extreme pressure of high-output engines. Formulated for the latest technology, high-output engines that operate at extreme temperatures, it meets API CF/SL, ACEA A3/B4, BMW LL 01, Ford WSS-M2C937-A, MB Approval 229.3/229.5, Porsche A40, and VW 502 00/505 00 specifications, covering European OEM gasoline requirements for BMW, Mercedes-Benz, Porsche, and VW/Audi.

Product Features:
  • Optimized to deliver 40% better performance than required by ACEA standards
  • Recommended by world leading auto manufacturers
  • Engine protection for the entire drain interval even under extreme pressure of high output engines
  • Meets API CF/SL, ACEA A3/B4, BMW LL 01, Meets Ford WSS-M2C937-A, MB Approval 229.3/229.5, Porsche A40, VW 502 00/505 00
  • Advanced Formulation: Specifically formulated for the latest technology, high-output engines that operate at extreme temperatures, ensuring reliable performance.
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Castrol – EDGE 5W-50 Full Synthetic Motor Oil, Max Performance, 1 Quart (Part No.152C6F)

EDGE 5W-50 Full Synthetic Motor Oil, Max Performance, 1 Quart

from

$11.99
Castrol EDGE 5W-50 Full Synthetic Motor Oil is Castrol’s strongest oil, designed for drivers seeking the ultimate in sludge protection, wear protection, and engine performance. This oil is 3X stronger against viscosity breakdown than the leading full synthetic, offers 10X better high-temperature performance, and provides 6X better wear protection. Meeting API SP/SN PLUS standards, it ensures your engine runs smoothly and efficiently, making it the natural choice for those who demand the best.

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
  • Ultimate Sludge Protection: Castrol EDGE 5W-50 with Fluid TITANIUM Technology offers superior sludge protection, ensuring your engine stays clean and efficient.
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Castrol – EDGE Euro Car 5W-30 C3 Full Synthetic Engine Oil 1 Quart (Part No.154BC4)

EDGE Euro Car 5W-30 C3 Full Synthetic Engine Oil 1 Quart

from

$12.49
CASTROL EDGE Euro Car 5W-30 C3 Full Synthetic Motor Oil is a high-performance engine oil that is designed to provide superior protection to the latest technology, high output engines that operate at extreme temperatures. This full-synthetic motor oil is formulated to transform under pressure, increasing film strength to prevent oil breakdown and reduce friction to unlock maximum performance. It is optimized to deliver 40% better performance than other motor oils and is recommended by world-leading auto manufacturers. This motor oil provides engine protection for the entire drain interval and meets API CF/SN, ACEA A3/B4, ACEA C3, GM dexos2 specifications. It is suitable for European OEM diesel specifications for Mercedes-Benz and VW/Audi. This motor oil was formerly known as Castrol SLX and is available in a 1-quart container.

Product Features:
  • Optimized to deliver 40% better performance than required by acea standards
  • Recommended by world leading auto manufacturers
  • Engine protection for the entire drain interval even under extreme pressure of high output engines
  • Meets api cf/sn, acea a3/b4, acea c3, gm dexos2, mb approval 229.31/229.51, vw 505 00/505 01, renault rn 0700/0710
  • Formerly known as castrol slx
  • Syntec Power Technology: The reformulated EDGE Engine Oil now features Syntec Power Technology, which enhances its performance even further.
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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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Pennzoil – Full Synthetic 5W-40 Engine Oil – Helps Extend Engine Life – 1 Qt Bottle (Part No.550051120)

Full Synthetic 5W-40 Engine Oil - Helps Extend Engine Life - 1 Qt Bottle

from

$11.49
Pennzoil Platinum Euro is designed for complete protection and performance for European vehicles. Pennzoil Platinum Euro helps extend engine life and protects for up to 15 years or 500,000 miles, whichever comes first. Guaranteed.1 Pennzoil Platinum Euro is made from natural gas, not crude. Its base oil is 99.5% free from engine clogging impurities. The Proof is in the Pennzoil. 1 Based on Sequence IIIH results . Does not apply to Pennzoil Platinum Euro motor oil.

Product Features:
  • No other leading engine oil provides better protection from friction1? 1 based on sequence iva wear test using sae 0w-40.
  • Better fuel economy2 2 meets the requirements of mb 229.5 which includes fuel economy improvement (fei) requirement as determined in industry standard gasoline engines
  • Protects horsepower
  • Nothing keeps your engine close to factory clean3 3 based on sequence vh and m-111 sludge test using sae 0w-40.
  • Complete protection and performance for European vehicles.
  • Extends engine life and protects for up to 15 years or 500,000 miles, whichever comes first.
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Castrol – GTX 10W-30 Conventional Motor Oil, Extends Engine Life, 1 Quart (Part No.15B400)

GTX 10W-30 Conventional Motor Oil, Extends Engine Life, 1 Quart

from

$9.99
Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life. Castrol GTX is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It has evolved to meet the needs of consumers and vehicle manufacturers since 1968 and continues to innovate and remain a trusted brand today. Severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals can all cause the build-up of a thick, tar like substance called sludge. If untreated, it can rob a car’s engine of its power and ultimately its life. GTX is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Help Extend the Life of Your Engine with Castrol GTX.

Product Features:
  • Superior protection against engine sludge (When tested in engines with a high level of sludge)
  • Advanced protection against viscosity and thermal breakdown
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Helps minimize oil consumption
  • Trusted Brand: With over 50 years of innovation and trust, Castrol GTX has evolved to meet the needs of both consumers and vehicle manufacturers since 1968.
  • Adaptable to Severe Conditions: Designed to perform under severe driving conditions such as heavy traffic, poor fuel quality, and harsh driving environments.
  • This premium conventional motor oil, with an SAE oil weight of 10W-30, meets the standard oil class requirements for a wide range of vehicles.
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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 – 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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Pennzoil – Platinum Euro 5W-40 Full Synthetic Engine Oil, 1 Quart (Part No.550040834)

Platinum Euro 5W-40 Full Synthetic Engine Oil, 1 Quart

from

$11.49
Pennzoil Platinum Euro SAE 5W-40 Full Synthetic motor oil with PurePlus Technology is a full synthetic motor oil that is formulated for most Mercedes-Benz, VW, Porsche & Audi Vehicles. PurePlus Technology converts pure natural gas into a base oil with lower friction, better low temperature properties and greater stability than conventional motor oil made from crude. Pennzoil Platinum Euro Full Synthetic motor oil is formulated for most European vehicles. It can be used in both passenger car gasoline and light duty diesel applications.

Product Features:
  • Nothing keeps your engine closer to factory clean
  • Better fuel economy
  • Protects horsepower
  • Superior wear and corrosion protection
  • Excellent performance in extreme temperatures
  • PurePlus Technology: The PurePlus Technology used in the Pennzoil Platinum Euro Full Synthetic Engine Oil provides complete protection to your engine. It converts pure natural gas into a base oil with lower friction, better low temperature properties and
  • For a full list of equipment approvals and recommendations, please consult your local shell technical help desk and always consult your owner’s manual.
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Castrol – GTX Conventional 20W-50 Engine Oil: Helps Protect Against Sludge Build Up, 5 Quart (Part No.15984B)

GTX Conventional 20W-50 Engine Oil: Helps Protect Against Sludge Build Up, 5 Quart

from

$29.99
Castrol GTX is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It continues to innovate to meet the needs of consumers and vehicle manufacturers and remains among the most trusted brands today. Severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals can all cause the build-up of a thick, tar like substance called sludge. If not addressed, it can rob a car’s engine of its power and ultimately its life. GTX is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards.

Product Features:
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge (when tested in engines with a high level of sludge)
  • Helps minimize oil consumption
  • Meets ilsac gf-6 specs
  • Unsurpassed thermal breakdown protection: GTX Engine Oil, 20W50 provides superior protection against thermal breakdown, ensuring that your engine stays cool and runs smoothly even under extreme conditions.
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Castrol – EDGE 10W-30 Full Synthetic Motor Oil, 1 Quart (Part No.152E4E)

EDGE 10W-30 Full Synthetic Motor Oil, 1 Quart

from

$11.99
Castrol EDGE 10W-30 Full Synthetic Motor Oil is Castrol’s strongest oil, ideal for drivers seeking the ultimate in sludge protection, wear protection, and 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, and Chrysler MS 6395 engine test requirements, 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
  • Ultimate Sludge and Wear Protection: Castrol EDGE 10W-30 Full Synthetic Motor Oil with Fluid TITANIUM Technology offers superior protection against sludge and wear, ensuring your engine remains clean and efficient.
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Pentosin – HP 5W-30 Synthetic Engine Oil meets service class API SL,CL (Part No.8043206)

HP 5W-30 Synthetic Engine Oil meets service class API SL,CL

from

$79.99
Pentosin HP 5W-30 Synthetic Motor Oil is a high-performance engine oil that is fully synthetic and designed for modern vehicles with extended oil service intervals. It is suitable for use in both gasoline and diesel engines, including those with turbochargers, as well as non-turbocharged vehicles that require 5W-30 oil. This all-season motor oil offers excellent protection against motor oil sludge and fuel deposits, and it contains special friction modifiers that help to reduce engine wear. Pentosin HP 5W-30 Synthetic Motor Oil is formulated for long service life intervals, making it an ideal choice for drivers who want to keep their engines running smoothly and efficiently. It meets service class API SL,CL.

Product Features:
  • An all- season engine oil offering great protection against harsh start-up conditions and extreme temperature changes.
  • Formulated for long service life intervals.
  • Reduces engine oil sludge and fuel deposits.
  • Contains special friction modifiers which help the engine run smoothly and improve fuel economy.
  • Fully Synthetic Formula: Pento High Performance Engine Oil is made with a full synthetic formula, providing superior protection and performance for your engine.
  • Meets API SL/CL Specs: This engine oil meets the latest API SL/CL specifications, ensuring that it meets the highest standards for engine protection and performance.
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Castrol – GTX 20W-50 Conventional Motor Oil: Helps Protect Against Sludge Build Up, 1 Quart (Part No.151A8E)

GTX 20W-50 Conventional Motor Oil: Helps Protect Against Sludge Build Up, 1 Quart

from

$9.99
Castrol® GTX® is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It continues to innovate to meet the needs of consumers and vehicle manufacturers and remains among the most trusted brands today. Severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals can all cause the build-up of a thick, tar like substance called sludge. If not addressed, it can rob a car’s engine of its power and ultimately its life. GTX is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards.

Product Features:
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge (when tested in engines with a high level of sludge)
  • Helps minimize oil consumption
  • Meets ILSAC GF-6 specs
  • Superior Performance: Exceeds tough industry standards in protecting against new oil splatter formation, providing superior performance and reliability.
  • Versatile Use: Suitable for a variety of driving conditions including heavy traffic, poor fuel quality, and harsh environments, making it a versatile choice for many vehicles.
  • High-Quality Composition: This conventional motor oil with SAE weight 20W-50 offers robust protection and performance, maintaining engine health and efficiency.
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Castrol – GTX Conventional 10W-40 Motor Oil: Helps Protect Against Sludge Build Up, 1 Quart (Part No.14CD5A)

GTX Conventional 10W-40 Motor Oil: Helps Protect Against Sludge Build Up, 1 Quart

from

$9.99
Castrol® GTX® is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It continues to innovate to meet the needs of consumers and vehicle manufacturers and remains among the most trusted brands today. Severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals can all cause the build-up of a thick, tar like substance called sludge. If not addressed, it can rob a car’s engine of its power and ultimately its life. GTX is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards.

Product Features:
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge (when tested in engines with a high level of sludge)
  • Helps minimize oil consumption
  • Meets ILSAC GF-6 specs
  • Engine Life Extension: Castrol« GTX« has been helping to extend engine life for over 50 years, making it one of the most trusted motor oil brands today.
  • Conventional Oil Composition: As a premium conventional motor oil, Castrol« GTX« meets the needs of both consumers and vehicle manufacturers.
  • Superior Performance: Exceeds tough industry standards by protecting against new oil splatter formation, ensuring optimal engine performance.
  • Versatile SAE Weight: With an SAE oil weight of 10W-40, Castrol« GTX« is suitable for a wide range of vehicles, providing reliable protection and performance.
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Castrol – EDGE High Mileage 10W-30 Full Synthetic Engine Oil 1 Quart (Part No.15979B)

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

from

$12.99
CASTROL EDGE High Mileage 10W-30 Full Synthetic Motor Oil 1 Quart is the perfect solution for vehicles with over 75K miles. It is formulated with Fluid Titanium Technology and Phosphorus Replacement Technology to provide 10X better high-temperature performance and 6X better wear protection. This motor oil meets API SP/SN PLUS, ILSAC GF-6, GM 6094M standards and offers motor oils that meet OEM specifications. It is available in different grades, including 5W-20, 5W-30, and 10W-30. This motor oil is the natural choice for consumers who want to extend maximum engine performance and preserve the catalytic converter and the emission system. Try CASTROL EDGE High Mileage today and experience the difference in your vehicle’s performance.

Product Features:
  • 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
  • From the makers of the No. 1 high mileage brand
  • Meets api sp/sn plus, ilsac gf-6, gm 6094m
  • Castrol edge offers engine oils that meet oem specification approvals or licenses that cover over 97.3% of the us car parc.
  • Available in the following grades: 5w-20, 5w-30, 10w-30, and 10w-40
  • Try castrol edge high mileage today
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FAQs for 1998 Audi A8 Engine Oil

What are the most popular Engine Oil for the 1998 Audi A8?

With 8 brands you can trust, our most popular Engine Oil for the 1998 Audi A8 parts 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 best aftermarket Engine Oil for the 1998 Audi A8?

See what past customers had to say about our highest-rated Engine Oil for the 1998 Audi A8:
FS European Car Formula Full Synthetic Engine Oil 0W-40, 5 Quart
from $37.99
(443)
FS European Car Formula Full Synthetic Engine Oil 0W-40, 5 Quart
“Best oil for foreign cars”
FS European Car Formula 0W-40 Full Synthetic Motor Oil, 1 Quart
from $11.99
(443)
FS European Car Formula 0W-40 Full Synthetic Motor Oil, 1 Quart
“The general consensus among Saab 9-3 owners is that this is the best and proper oil to use.”