July 1, 2025

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10 Best synthetic motor oils of 2025

Save up to 43% off

Best Choice

1

Shell Rotella
Shell Rotella T6 Full Synthetic 5W-40 Motor Oil, 1 Gallon (3 Pack)

43% Off
Main highlights

Triple Protection Plus Technology
Full synthetic 5W-40 oil protects against wear, deposits, and oil breakdown.

Versatile Heavy-Duty Applications
Ideal for pickup trucks, tractors, semi rigs, and more.

Consistent Performance Praise
Users appreciate smooth, quiet engine operation and reliability.
9.6

Exceptional

Our Rating

9.7
Long life

9.7
distance

9.3
worth the money
How do we rank?

Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you

Careful review Our team ensures quality, value, and fit based on real user feedback

Trusted insights AI and human analysis guide your decisions, reflecting real user priorities
Real users impact

Thousands of users trust our site daily

Based on millions of stores and reviews

Shoppers influence our rankings
Analyzing top stores
Value for Money

2

Pennzoil
Pennzoil Ultra Platinum Full Synthetic 0W-40 Motor Oil, 1 Quart (6 Pack)

37% Off
Main highlights

Unbeatable Engine Protection
Pennzoil Ultra Platinum 0W-40 offers 20-year, 750,000-mile warranty for superior engine safeguarding.

Ideal for High-Performance Engines
Perfect for high-performance engines needing exceptional protection and power retention.

Outstanding Extreme Temperature Performance
Customers praise its reliability in both hot and cold conditions.
9.5

Excellent

Our Rating
3

Mobil
Mobil 1 Advanced Full Synthetic Motor Oil 5W-20, 5 Quart
Main highlights

Outstanding Engine Performance
Mobil 1 advanced full-synthetic motor oil 5W-20 offers superior engine performance and protection with its Triple Action Formula.

Long-Lasting Protection
Ideal for vehicles needing up to 10,000 miles between oil changes, maintaining viscosity and preventing breakdown.

Praised Performance
Customers frequently commend its ability to enhance engine smoothness and reliability over long distances.
9.4

Excellent

Our Rating

9.9
Precision

9.9
Sheerness

9.9
distance
4

Castrol
Castrol GTX Full Synthetic 5W-30 Motor Oil, 5 Quarts

15% Off
Main highlights

Superior Wear Protection
Offers 6X better wear protection than industry standards, ensuring longevity for critical engine parts.

Ideal for High Mileage Vehicles
Perfect for vehicles requiring superior sludge cleaning and protection against new formation.

Praised for Reliability
Customers highly rate its consistent performance and competitive pricing.
9.3

Excellent

Our Rating

9.9
Long life

9.9
materials Quality

9.9
distance
5

Valvoline
Valvoline High Mileage with MaxLife Technology 10W-30 Synthetic Blend Motor Oil 5 QT

37% Off
Main highlights

Key Features
Offers 40% better wear protection, ensuring engines run smoother, longer. Utilizes MAXLIFE TECHNOLOGY to prevent breakdowns.

Ideal Use Cases
Perfect for older vehicles or high-mileage cars needing extra care to extend engine life and improve performance.

Customer Reviews
Most praised for significantly reducing engine noise and improving overall vehicle reliability according to numerous customer testimonials.
9.0

Excellent

Our Rating

9.9
Long life

9.9
distance

9.7
worth the money
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6

Valvoline
Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil 5 QT

25% Off
Main highlights

Key Features and Benefits
Valvoline Advanced Full Synthetic 5W-30 enhances engine longevity and performance.

Ideal Use Cases
Perfect for high-mileage vehicles and rigorous driving conditions.

Praised Feature
Exceptional additive packages praised for enhancing engine performance.
8.7

Very Good

Our Rating

9.7
worth the money

9.7
Long life

9.7
distance
7

Castrol
Castrol GTX Full Synthetic 0W-20 Motor Oil, 5 Quarts

14% Off
Main highlights

Superior Wear and Sludge Protection
Offers 6X better wear protection and 1.3X better sludge protection than industry standards.

Ideal for Long-Term Engine Health
Perfect for those seeking reliable engine longevity and cleanliness.

Highly Trusted by Customers
Praised for quality and reliability by users for over 25 years.
8.6

Very Good

Our Rating

9.9
distance

9.9
Long life

9.7
worth the money
8

Quaker State
Quaker State Full Synthetic 5W-30 Motor Oil, 5-Quart
Main highlights

Strong Performance and Protection
Full synthetic 5W-30 motor oil ensures engine performance and protection against deposits.

Versatile Use for Various Engines
Ideal for cars, SUVs, light vans, trucks, and turbocharged engines.

Highly Praised for Affordability
Customers appreciate the competitive pricing and value offered by Quaker State.
8.5

Good

Our Rating
9

Mobil
Mobil 1 High Mileage Full Synthetic Motor Oil 0W-20, 5 Quart, Gray
Main highlights

Outstanding Engine Performance
Mobil 1 High Mileage oil improves engine performance, protection, and cleanliness with its Triple Action Formula.

Ideal for High Mileage Vehicles
Perfect for engines over 75,000 miles, extending intervals up to 10,000 miles.

Praised for Fuel Efficiency
Customers report remarkable fuel efficiency improvements, surpassing original vehicle ratings.
8.3

Good

Our Rating

9.9
Precision

9.9
distance

9.9
Sheerness
10

Castrol
Castrol GTX Full Synthetic 5W-20 Motor Oil, 5 Quarts

15% Off
Main highlights

Key Features
Offers 6X better wear protection, 1.3X superior sludge protection with a full synthetic formula for high thermal and oxidation stability.

Ideal Use Cases
Perfect for vehicles frequently facing harsh driving conditions, high temperatures, or those requiring extended performance and engine life.

Customer Reviews Summary
Most praised for significantly reducing engine wear and noise, leading to smoother performance and longer engine lifespan.
8.2

Good

Our Rating

9.9
Long life

9.9
distance

9.7
worth the money

10 Best synthetic motor oils of 2025

1

Shell Rotella T6 Full Synthetic 5W-40 Motor Oil, 1 Gallon (3 Pack)

9.7

9.7

9.3

How do we rank?

How do we rank?

Analyzing top stores

2

Pennzoil Ultra Platinum Full Synthetic 0W-40 Motor Oil, 1 Quart (6 Pack)

3

Mobil 1 Advanced Full Synthetic Motor Oil 5W-20, 5 Quart

9.9

9.9

9.9

4

Castrol GTX Full Synthetic 5W-30 Motor Oil, 5 Quarts

9.9

9.9

9.9

5

Valvoline High Mileage with MaxLife Technology 10W-30 Synthetic Blend Motor Oil 5 QT

9.9

9.9

9.7

6

Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil 5 QT

9.7

9.7

9.7

7

Castrol GTX Full Synthetic 0W-20 Motor Oil, 5 Quarts

9.9

9.9

9.7

8

Quaker State Full Synthetic 5W-30 Motor Oil, 5-Quart

9

Mobil 1 High Mileage Full Synthetic Motor Oil 0W-20, 5 Quart, Gray

9.9

9.9

9.9

10

Castrol GTX Full Synthetic 5W-20 Motor Oil, 5 Quarts

9.9

9.9

9.7

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