1991 Infiniti Q45 Engine Oils

Enhance and Protect Your 1991 Infiniti Q45 with Quality Engine Oils

Maintaining the performance of your 1991 Infiniti Q45 starts with choosing the right parts, and a high-quality Engine Oil helps ensure a reliable and efficient vehicle. At Advance Auto Parts, we offer Engine Oils specifically for the 1991 Infiniti Q45, ensuring a perfect fit and lasting durability. Choosing to shop with Advance Auto Parts means you’re making a smart decision to prioritize both quality and reliability for your vehicle.

Affordable and Reliable Engine Oils for Every Budget

Finding an Engine Oil that combines quality with affordability is easy at Advance Auto Parts. With prices starting as low as $5.89 and an average price of $18.85, you can choose one that fits your budget while delivering the quality you expect. Our Engine Oils are competitively priced, ranging from $5.89 to $38.99, so you get value without compromising on strength or reliability.

Trusted Brands and Top-Rated Options

With 47 Engine Oils from 4 trusted brands in stock, Advance Auto Parts has you covered. Our Engine Oils for the 1991 Infiniti Q45 have earned reviews from over 4996 customers, with an average 5 stars rating across the board. Popular options include EDGE High Mileage 5W-30 Advanced Full Synthetic Engine Oil, 5 Qts, 5W-30 Full Synthetic Motor Oil: 5 Quarts, and GTX High Mileage 5W-30 Synthetic Blend Engine Oil, 5 Quarts, starting at $27.99. Our selection includes highly regarded brands such as Castrol, Fram, and Valvoline, and more, offering you top-notch reliability. For example, we have 23 Castrol Engine Oils starting at $9.99 with an average rating of 5 stars, 19 Fram options from $6.49 with a 4 stars rating, and 2 Valvoline Engine Oils priced from $29.99 with a 5 stars average rating.

Engine Oils for Your 1991 Infiniti Q45

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 5W-30 is an advanced full synthetic motor oil that is specifically designed for vehicles with over 75,000 miles. It’s been engineered to reduce leaks, burnoff and power robbing deposits, but also contains a proprietary additive to protect the emission system. Our Phosphorus Replacement Technology reduces harmful phosphorus to protect the catalytic converter and extend maximum performance. It is the natural choice for drivers who demand maximum performance from their high mileage car.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Reduces leaks, oil burnoff and power robbing deposits
  • 15,000 miles between oil changes (1)
  • (1) Or one year, whichever comes first
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • Porsche A40
  • Meets engine test requirements of Chrysler MS 6395
  • Meets Ford WSS-M2C961-A1
See More

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 5W-30 is the No. 1 consumer high-mileage brand of motor oil. It’s a synthetic blend engine oil that helps extend the life of engines by protecting against sludge, wear and burn-off. Engineered with Phosphorous Replacement Technology, it also protects emission systems by replacing some of the phosphorous that can damage catalytic converters.

Product Features:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (1)
  • Seal conditioners to help reduce leaks
  • Advanced additives that minimize engine wear
  • Improved fuel economy (2)
  • (1) Based on API and ACEA volatility specifications
  • MB-Approval 229.5
  • (2) In 5W-20, 5W-30 and 10W-30 grades versus industry specifications
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • Meets Ford WSS-M2C946-B1
  • Meets Ford WSS-M2C961-A1
See More

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 5W-30 is an advanced full synthetic motor oil and the optimal choice for drivers who want the best combination of wear protection, viscosity control and thermal stability to maximize engine performance. It is one of Castrols strongest engine oils with the strength to maintain this unsurpassed level of engine protection for up to 20,000 miles between oil changes or one year.

Product Features:
  • 3X Stronger than the leading full synthetic (1)
  • 10X Better high stress performance (2)
  • 20,000 miles between oil changes (3)
  • (1) Viscosity breakdown as measured in Kurt Orbahn test on 5W-30 grade
  • (2) As measured in Seq IX test under high load/torque conditions vs. API SP test limits
  • (3) Or one year, whichever comes first
  • Approved and Licensed Specifications:
  • ILSAC GF-6
  • Exceeds API SP/SN PLUS/SN/SM
  • GM dexos1 Gen 3
  • Meets engine test requirements of Chrysler MS 6395
  • Meets Ford WSS-M2C946-B1
  • Meets Ford WSS-M2C961-A1
See More

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 10W-30 is the No. 1 consumer high-mileage brand of motor oil. It’s a synthetic blend engine oil that helps extend the life of engines by protecting against sludge, wear and burn-off. Engineered with Phosphorous Replacement Technology, it also protects emission systems by replacing some of the phosphorous that can damage catalytic converters.

Product Features:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (1)
  • Seal conditioners to help reduce leaks
  • Advanced additives that minimize engine wear
  • Improved fuel economy (2)
  • (1) Based on API and ACEA volatility specifications
  • ILSAC GF-6
  • (2) In 5W-20, 5W-30 and 10W-30 grades versus industry specifications
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
See More

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 5W-30 is an advanced full synthetic motor oil and the optimal choice for drivers who want the best combination of wear protection, viscosity control and thermal stability to maximize engine performance. It is one of Castrols strongest engine oils with the strength to maintain this unsurpassed level of engine protection for up to 20,000 miles between oil changes or one year.

Product Features:
  • 3X Stronger than the leading full synthetic (1)
  • 10X Better high stress performance (2)
  • 20,000 miles between oil changes (3)
  • (1) Viscosity breakdown as measured in Kurt Orbahn test on 5W-30 grade
  • (2) As measured in Seq IX test under high load/torque conditions vs. API SP test limits
  • (3) Or one year, whichever comes first
  • Approved and Licensed Specifications:
  • ACEA A5/B5, C2
  • Exceeds API SP/SN PLUS/SN/SM
  • GM dexos1 Gen 3
  • Meets engine test requirements of Chrysler MS 6395
  • Meets Ford WSS-M2C946-B1
  • Meets Ford WSS-M2C961-A1
See More

Castrol – EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart (Part No.15979F)

EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart

from

$12.99
Castrol EDGE High Mileage 5W-30 is an advanced full synthetic motor oil that is specifically designed for vehicles with over 75,000 miles. It’s been engineered to reduce leaks, burnoff and power robbing deposits, but also contains a proprietary additive to protect the emission system. Our Phosphorus Replacement Technology reduces harmful phosphorus to protect the catalytic converter and extend maximum performance. It is the natural choice for drivers who demand maximum performance from their high mileage car.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Reduces leaks, oil burnoff and power robbing deposits
  • 15,000 miles between oil changes (1)
  • (1) Or one year, whichever comes first
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • Meets Ford WSS-M2C960-A1
  • Meets engine test requirements of Chrysler MS 6395
  • Meets Ford WSS-M2C946-B1
  • Meets Ford WSS-M2C961-A1
See More

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

GTX  5W-30 Synthetic Blend Motor Oil, 5 Quart

from

$29.99
Castrol GTX 5W-30 is a synthetic blend motor oil with a double-action formula proven to clean away the sludge that can block engine oilways (1) and help prevent new sludge formation. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life. (1) When tested in engines with a high level of sludge.

Product Features:
  • Premium-quality base oils and anti-wear additives that help extend engine life
  • Superior protection against engine sludge
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against high-temperature deposits
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • ILSAC GF-6
  • Meets Ford WSS-M2C946-B1
See More

Castrol – GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 1 Quart (Part No.149D6A)

GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 1 Quart

from

$10.49
Castrol GTX High Mileage 5W-30 is the #1 consumer high-mileage brand of motor oil. It’s a synthetic blend engine oil that helps extend the life of engines by protecting against sludge, wear and burn-off. Engineered with Phosphorous Replacement Technology, it also protects emission systems by replacing some of the phosphorous that can damage catalytic converters.

Product Features:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards (1)
  • Seal conditioners to help reduce leaks
  • Advanced additives that minimize engine wear
  • Improved fuel economy (2)
  • (1)Based on API and ACEA volatility specifications
  • Approved for BMW M-Models
  • (2) In 5W-20, 5W-30 and 10W-30 grades versus industry specifications
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • Meets Ford WSS-M2C946-B1
  • Meets Ford WSS-M2C961-A1
See More

Castrol – GTX 10W-30 Conventional Motor Oil, 5 Quarts (Part No.15B7AA)

GTX 10W-30 Conventional Motor Oil, 5 Quarts

from

$29.99
Castrol GTX 10W-30 is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life.

Product Features:
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Helps minimize oil consumption
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • Meets Ford WSS-M2C961-A1
See More

Castrol – EDGE Euro 5W-30 A3/B4 Advanced Full Synthetic Motor Oil, 1 Quart (Part No.15484E)

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

from

$12.49
Castrol EDGE Euro 5W-30 A3/B4 is an advanced full synthetic motor oil engineered to exceed manufacturer test limits ensuring the highest level of protection and maximum performance for European cars. European car manufacturers create unique motor oil specifications to ensure the lubricant can withstand the intense pressure, heat and friction generated in a high output engine. To ensure compliance, rigorous engine tests are developed, with approval granted only when the oil achieves the minimum values required in each test. Castrol EDGE Euro Car fluids are formulated to exceed these requirements and deliver maximum protection and performance.

Product Features:
  • 1.2X Better viscosity control to help engines run better for longer (1)
  • 2X Better engine cleanliness to help maximize engine performance (2)
  • (1) As measured in DV6 test vs. test limit
  • (2) As measured in OM646LA test vs. test limit
  • Approved and licensed specifications:
  • ACEA A3/B4
  • API SL
  • Meets Ford WSS-M2C946-B1
  • BMW Longlife-01
  • MB-Approval 229.5
  • VW 502 00 / 505 00
See More

Valvoline – High Mileage with MaxLife Technology Synthetic Blend 10W-30 Engine Oil: Maximize Engine Life, 5 Quart (Part No.881161)

High Mileage with MaxLife Technology Synthetic Blend 10W-30 Engine Oil: Maximize Engine Life, 5 Quart

from

$29.99
75,000 miles is more than a mile marker. It’s a signal that your engine is ready for greater protection. That’s when you need Valvoline High Mileage with MaxLife Technology Motor Oil. Its exclusive formula is proven to maximize engine life in cars, trucks, and SUVs with over 75,000 miles. Our mixture is specially developed with a unique combination of synthetic and premium conventional oils to protect your high-mileage motor against wear, friction, heat, and deposits – the four major causes of engine breakdown and expensive repairs. Anti-wear additives defend critical engine components, advanced friction-fighting agents reduce heat and abrasion, added detergents clean the inside of your engine, and premium seal conditioners handle aging seals to prevent leaks. It fights sludge, corrosion and rust that can rob your engine of horsepower, fuel efficiency and longevity. From extreme temperatures and cold starts to stop-and-go traffic and frequent short trips, viscosity modifiers make sure the oil flows more easily, coats more completely, and resists thermal breakdown under even the most intense driving conditions. Its unique mixture curbs contaminants to keep high-mileage engines from burning and consuming oil that can foul spark plugs, creating higher emissions and causing your motor to run roughly.

Product Features:
  • Maxlife technology prevents engine breakdown with 40% better wear protection than the industry standard
  • Refresh aging seals and prevent leaks with seal conditioners
  • Reduce sludge, deposits, corrosion, and rust with added detergents – keep motors clean inside
  • Enhanced friction performance helps maximize power with advanced friction-fighting agents
  • Meets or exceeds all requirements of ilsac gf-6a, api sp, api sn with sn plus, api sn
  • MaxLife Technology: The exclusive formula of Valvoline High Mileage with MaxLife Technology Engine Oil is proven to maximize engine life in cars, trucks, and SUVs with over 75,000 miles.
See More

Castrol – EDGE Euro Car 5W-30 C3 Full Synthetic Motor Oil, 1 Quart (Part No.154BC4)

EDGE Euro Car 5W-30 C3 Full Synthetic Motor 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.
See More

Castrol – GTX 5W-20 Synthetic Blend Motor Oil, 5 Quarts (Part No.15A66C)

GTX 5W-20 Synthetic Blend Motor Oil, 5 Quarts

from

$9.99
Castrol GTX 5W-20 is a synthetic blend motor oil with a double-action formula proven to clean away the sludge that can block engine oilways (1) and help prevent new sludge formation. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life. (1) When tested in engines with a high level of sludge

Product Features:
  • Premium-quality base oils and anti-wear additives that help extend engine life
  • Superior protection against engine sludge
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against high-temperature deposits
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • Meets or exceeds the following specifications:
  • Meets Ford WSS-M2C945-B1
  • Meets Ford WSS-M2C960-A1
See More

Castrol – GTX 10W-30 Conventional Motor Oil, 1 Quart (Part No.15B400)

GTX 10W-30 Conventional Motor Oil, 1 Quart

from

$9.99
Castrol GTX 10W-30 is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life.

Product Features:
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Helps minimize oil consumption
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
  • Meets Ford WSS-M2C960-A1
See More

Castrol – GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 1 Quart (Part No.149D6C)

GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 1 Quart

from

$10.49
Castrol GTX High Mileage 10W-30 is the No. 1 consumer high-mileage brand of motor oil. It’s a synthetic blend engine oil that helps extend the life of engines by protecting against sludge, wear and burn-off. Engineered with Phosphorous Replacement Technology, it also protects emission systems by replacing some of the phosphorous that can damage catalytic converters.

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 (1)
  • Seal conditioners to help reduce leaks
  • Advanced additives that minimize engine wear
  • Improved fuel economy (2)
  • (1) Based on API and ACEA volatility specifications
  • Meets or exceeds the following specifications:
  • (2) In 5W-20, 5W-30 and 10W-30 grades versus industry specifications
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SM
  • ILSAC GF-6
See More

Castrol – EDGE 10W-30 Advanced Full Synthetic Motor Oil, 5 Quarts (Part No.1598B6)

EDGE 10W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

from

$37.99
Castrol EDGE 10W-30 is an advanced full synthetic motor oil and the optimal choice for drivers who want the best combination of wear protection, viscosity control and thermal stability to maximize engine performance. It is one of Castrols strongest engine oils with the strength to maintain this unsurpassed level of engine protection for up to 20,000 miles between oil changes or one year.

Product Features:
  • 3X Stronger than the leading full synthetic (1)
  • 10X Better high stress performance (2)
  • 20,000 miles between oil changes (3)
  • (1) Viscosity breakdown as measured in Kurt Orbahn test on 5W-30 grade
  • (2) As measured in Seq IX test under high load/torque conditions vs. API SP test limits
  • (3) Or one year, whichever comes first
  • Approved and Licensed Specifications:
  • Exceeds API SP/SN PLUS/SN/SM
See More

Castrol – EDGE 10W-30 Advanced Full Synthetic Motor Oil, 1 Quart (Part No.152E4E)

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

from

$11.99
Castrol EDGE 10W-30 is an advanced full synthetic motor oil and the optimal choice for drivers who want the best combination of wear protection, viscosity control and thermal stability to maximize engine performance. It is one of Castrols strongest engine oils with the strength to maintain this unsurpassed level of engine protection for up to 20,000 miles between oil changes or one year.

Product Features:
  • 3X Stronger than the leading full synthetic (1)
  • 10X Better high stress performance (2)
  • 20,000 miles between oil changes (3)
  • (1) Viscosity breakdown as measured in Kurt Orbahn test on 5W-30 grade
  • (2) As measured in Seq IX test under high load/torque conditions vs. API SP test limits
  • (3) Or one year, whichever comes first
  • Approved and Licensed Specifications:
  • Exceeds API SP/SN PLUS/SN/SM
  • ILSAC GF-6
See More

Castrol – GTX 10W-40 Conventional Motor Oil, 1 Quart (Part No.14CD5A)

GTX 10W-40 Conventional Motor Oil, 1 Quart

from

$9.99
Castrol GTX 10W-40 is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life.

Product Features:
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Helps minimize oil consumption
  • (1) When tested in engines with a high level of sludge
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
See More

Castrol – EDGE High Mileage 10W-30 Advanced Full Synthetic Motor Oil, 1 Quart (Part No.15979B)

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

from

$12.99
Castrol EDGE High Mileage 10W-30 is an advanced full synthetic motor oil that is specifically designed for vehicles with over 75,000 miles. It’s been engineered to reduce leaks, burnoff and power robbing deposits, but also contains a proprietary additive to protect the emission system. Our Phosphorus Replacement Technology reduces harmful phosphorus to protect the catalytic converter and extend maximum performance. It is the natural choice for drivers who demand maximum performance from their high mileage car.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Reduces leaks, oil burnoff and power robbing deposits
  • 15,000 miles between oil changes (1)
  • (1) Or one year, whichever comes first
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
See More

Castrol – EDGE High Mileage 10W-40 Advanced Full Synthetic Motor Oil, 1 Quart (Part No.15989F)

EDGE High Mileage 10W-40 Advanced Full Synthetic Motor Oil, 1 Quart

from

$12.99
Castrol EDGE High Mileage 10W-40 is an advanced full synthetic motor oil that is specifically designed for vehicles with over 75,000 miles. It’s been engineered to reduce leaks, burnoff and power robbing deposits, but also contains a proprietary additive to protect the emission system. Our Phosphorus Replacement Technology reduces harmful phosphorus to protect the catalytic converter and extend maximum performance. It is the natural choice for drivers who demand maximum performance from their high mileage car.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Reduces leaks, oil burnoff and power robbing deposits
  • 15,000 miles between oil changes (1)
  • (1) Or one year, whichever comes first
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
See More

Castrol – GTX 10W-40 Conventional Motor Oil, 5 Quarts (Part No.15982E)

GTX 10W-40 Conventional Motor Oil, 5 Quarts

from

$31.99
Castrol GTX 10W-40 is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards. Sludge is a thick, tar like substance caused by severe driving conditions such as heavy traffic, poor fuel quality, harsh driving conditions and exceeding oil change intervals. Sludge can block your engine’s vital oilways like cholesterol and if untreated, can rob an engine of its power and ultimately its life.

Product Features:
  • Advanced protection against viscosity and thermal breakdown
  • Superior protection against engine sludge
  • Premium quality base oils and anti-wear additives to help extend the life of your engine
  • Helps minimize oil consumption
  • (1) When tested in engines with a high level of sludge
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
See More

Valvoline – High Mileage with MaxLife Technology Synthetic Blend 10W-30 Motor Oil: Maximize Engine Life, 5 Quart (Part No.779462)

High Mileage with MaxLife Technology Synthetic Blend 10W-30 Motor Oil: Maximize Engine Life, 5 Quart

from

$31.99
75,000 miles is more than a mile marker. It’s a signal that your engine is ready for greater protection. That’s when you need Valvoline High Mileage with MaxLife Technology Motor Oil. Its exclusive formula is proven to maximize engine life in cars, trucks, and SUVs with over 75,000 miles. Our mixture is specially developed with a unique combination of synthetic and premium conventional oils to protect your high-mileage motor against wear, friction, heat, and deposits – the four major causes of engine breakdown and expensive repairs. Anti-wear additives defend critical engine components, advanced friction-fighting agents reduce heat and abrasion, added detergents clean the inside of your engine, and premium seal conditioners handle aging seals to prevent leaks. It fights sludge, corrosion and rust that can rob your engine of horsepower, fuel efficiency and longevity. From extreme temperatures and cold starts to stop-and-go traffic and frequent short trips, viscosity modifiers make sure the oil flows more easily, coats more completely, and resists thermal breakdown under even the most intense driving conditions. Its unique mixture curbs contaminants to keep high-mileage engines from burning and consuming oil that can foul spark plugs, creating higher emissions and causing your motor to run roughly.

Product Features:
  • MAXLIFE TECHNOLOGY PREVENTS engine breakdown with 40% better wear protection than the industry standard
  • REFRESH AGING SEALS AND PREVENT LEAKS with seal conditioners
  • REDUCE SLUDGE, DEPOSITS, CORROSION, AND RUST with added detergents – keep motors clean inside
  • ENHANCED FRICTION PERFORMANCE HELPS MAXIMIZE POWER with advanced friction-fighting agents
  • MEETS OR EXCEEDS ALL REQUIREMENTS of ILSAC GF-6A, API SP, API SN with SN PLUS, API SN
  • MaxLife Technology: Valvoline High Mileage with MaxLife Technology is specially formulated to maximize engine life in vehicles with over 75,000 miles, providing superior protection against wear, friction, heat, and deposits.
  • Synthetic Blend Composition: This motor oil features a unique combination of synthetic and premium conventional oils, ensuring optimal performance and protection for high-mileage engines.
See More

Mobil Super – 10W-30 Synthetic Blend Motor Oil, 5 Quart (Part No.98008)

10W-30 Synthetic Blend Motor Oil, 5 Quart

from

$25.99
Mobil Super 10W-30 Synthetic Blend motor oil helps to extend your engine life and provide engine protection up to 5,000 miles for gasoline cars and light-duty trucks. Mobil Super has 15 percent extra cleaning additives to help prevent the formation of sludge and deposits when compared to Mobil conventional motor oil. Helps to get your engine cleaner, conserve viscosity for easier cold starting, and provide outstanding engine wear protection under a variety of operating conditions. Meets or exceeds the requirements of: API SN, SM, SL, API SN Plus.

Product Features:
  • Mobil Super Synthetic Blend motor oil 10W-30 works to protect your engine from sludge and deposits for up to 5,000 miles
  • Helps to keep your engine clean with 15 percent extra cleaning additives, preventing sludge and deposit formation
  • Works to provide outstanding engine wear protection under a variety of operating conditions
  • Enhanced formulation (vs. Mobil basic conventional oil) helps to conserves oil viscosity for easier cold starting
  • Recommended for gasoline cars and light-duty trucks
See More

Mobil Super – 10W-30 Synthetic Blend Motor Oil, 1 Quart (Part No.97025)

10W-30 Synthetic Blend Motor Oil, 1 Quart

from

$5.89
Mobil Super 10W-30 Synthetic Blend motor oil helps to extend your engine life and provide engine protection up to 5,000 miles for gasoline cars and light-duty trucks. Mobil Super has 15 percent extra cleaning additives to help prevent the formation of sludge and deposits when compared to Mobil conventional motor oil. Helps to get your engine cleaner, conserve viscosity for easier cold starting, and provide outstanding engine wear protection under a variety of operating conditions. Meets or exceeds the requirements of: API SN, SM, SL, API SN Plus.

Product Features:
  • Mobil Super Synthetic Blend motor oil 10W-30 works to protect your engine from sludge and deposits for up to 5,000 miles
  • Helps to keep your engine clean with 15 percent extra cleaning additives, preventing sludge and deposit formation
  • Works to provide outstanding engine wear protection under a variety of operating conditions
  • Enhanced formulation (vs. Mobil basic conventional oil) helps to conserves oil viscosity for easier cold starting
  • Recommended for gasoline cars and light-duty trucks
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Castrol – EDGE High Mileage 10W-30 Advanced Full Synthetic Motor Oil, 5 Quarts (Part No.15906F)

EDGE High Mileage 10W-30 Advanced Full Synthetic Motor Oil, 5 Quarts

from

$38.99
Castrol EDGE High Mileage 10W-30 is an advanced full synthetic motor oil that is specifically designed for vehicles with over 75,000 miles. It’s been engineered to reduce leaks, burnoff and power robbing deposits, but also contains a proprietary additive to protect the emission system. Our Phosphorus Replacement Technology reduces harmful phosphorus to protect the catalytic converter and extend maximum performance. It is the natural choice for drivers who demand maximum performance from their high mileage car.

Product Features:
  • Phosphorus Replacement Technology to help extend the life of the emission system
  • Reduces leaks, oil burnoff and power robbing deposits
  • 15,000 miles between oil changes (1)
  • (1) Or one year, whichever comes first
  • Meets or exceeds the following specifications:
  • API SP/SN PLUS/SN/SM
  • ILSAC GF-6
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Mobil Super – Super 10W-40 Synthetic Blend Motor Oil, 1 Quart (Part No.97026)

Super 10W-40 Synthetic Blend Motor Oil, 1 Quart

from

$6.99
Mobil Super 10W-40 synthetic blend motor oil helps to extend your engine life and provide engine protection up to 5,000 miles for gasoline cars and light-duty trucks. Mobil Super has 15 percent extra cleaning additives to help prevent the formation of sludge and deposits when compared to Mobil conventional motor oil. Helps to get your engine cleaner, conserve viscosity for easier cold starting, and provide outstanding engine wear protection under a variety of operating conditions. Meets or exceeds the requirements of: API SN, SM, SL, API SN Plus. (Or your vehicle’s OEM recommended oil change interval, whichever is longer. Some limitations apply, see Mobil Super Limited Warranty: https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/mobil-limited-warranties/mobil-super-limited-warranty)

Product Features:
  • Mobil Super synthetic blend motor oil 10W-40 works to protect your engine from sludge and deposits for up to 5,000 miles
  • Helps to keep your engine clean with 15 percent extra cleaning additives, preventing sludge and deposit formation
  • Works to provide outstanding engine wear protection under a variety of operating conditions
  • Enhanced formulation (vs. Mobil basic conventional oil ) helps to conserves oil viscosity for easier cold starting
  • Recommended for gasoline cars and light-duty trucks
  • Manufacturer Part Number: 124402
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FRAM – 5W-30 Full Synthetic Motor Oil: 5 Quart (Part No.F930-5QT)

5W-30 Full Synthetic Motor Oil: 5 Quart

from

$27.99
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 dexos1 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 dexos1 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 Dexos1 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 dexos1 Gen 3: This oil is a fully licensed GM dexos1 Gen 3 motor oil, ensuring it meets the high standards set by General Motors for optimal engine performance.
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FRAM – 5 Qt Conventional 5W30 Engine Oil with Low-Speed Pre-Ignition Control (Part No.F620-5QT)

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

from

$25.99
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 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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FAQs for 1991 Infiniti Q45 Engine Oils

Which Engine Oils are the top sellers for the 1991 Infiniti Q45?

Out of 47 Engine Oils that fit 1991 Infiniti Q45s, the following parts are the top sellers:
5W-30 Full Synthetic Motor Oil: 5 Quart
from $27.99
This product is not rated
5W-30 Full Synthetic Motor Oil: 5 Quart
Engine Oil

How can I make sure that a part will be compatible with my 1991 Infiniti Q45?

Our Infiniti Q45 aftermarket and OEM parts are designed specifically for the 1991 model. You can always find your specific fitment and compatibility for your 1991 Infiniti on an individual product page.

What is the price range for 1991 Infiniti Q45 Engine Oils?

The range of prices of Engine Oils for the 1991 Infiniti Q45 goes from $5.89 up to $38.99 for the most premium parts.

What is the average price of 1991 Infiniti Q45 Engine Oils?

1991 Infiniti Q45 Engine Oils average $18.85 for our selection of OEM and aftermarket parts. Keep in mind the variety of brands we offer, such as Castrol, Fram, Valvoline, and more, so you are likely to find a wide range of prices across a variety of brands and products.

Does Advance Auto Parts sell Engine Oils for other Infiniti Q45 model years?

Yes, we currently stock Engine Oils for 16 model years of Infiniti Q45s, from 1990 to 2006. Model years 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, and 1998 are the most popular for Engine Oils purchases.

Which Engine Oils are highest rated for the 1991 Infiniti Q45?

Based on 4,996 customer reviews, our 1991 Infiniti Q45 Engine Oils have an average rating of 5. Explore our top-rated Engine Oils here:
EDGE 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart
from $11.99
(442)
EDGE 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart
“The best oil for my car.”
GTX  5W-30 Synthetic Blend Motor Oil, 5 Quart
from $29.99
(333)
GTX 5W-30 Synthetic Blend Motor Oil, 5 Quart
“Great sale package with filter.”
GTX 5W-20 Synthetic Blend Motor Oil, 5 Quarts
from $9.99
(333)
GTX 5W-20 Synthetic Blend Motor Oil, 5 Quarts
“Good price and good product”

Can I get help with 1991 Infiniti Q45 Engine Oils orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Infiniti Engine Oils and more.

What is your return policy for Infiniti Q45 Engine Oils?

Advance Auto Parts keeps returns simple. For new Infiniti Q45 Engine Oils and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.