November 3, 2025

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10 Best synthetic engine oils of 2025

Save up to 37% off

Best Choice

1

Valvoline
Valvoline Extended Protection Full Synthetic 0W-20 Motor Oil 5 Quart

25% Off
Main highlights

Ultimate Engine Protection
Offers protection against wear, friction, heat, and deposits.

Versatile Use Cases
Suitable for personal vehicles and high-performance race cars.

Trusted by Users
Praised for reliability and performance in customer reviews.
9.8

Exceptional

Our Rating

9.9
worth the money

9.9
Long life

9.9
distance
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

Mobil

Mobil 1 Advanced Full Synthetic Motor Oil 5W-30, 5 Quart
9.7

Exceptional

Our Rating

9.9
Long life

9.9
distance

9.7
worth the money
3

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.
9.4

Excellent

Our Rating

9.7
worth the money

9.7
Long life

9.7
distance
4

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

37% Off
Main highlights

Enhanced Engine Protection
MaxLife Technology offers 40% better wear protection than industry standard.

Ideal for High Mileage Vehicles
Perfect for older vehicles with over 150,000 miles, addressing minor oil leaks.

Seal Conditioning Praised
Customers appreciate its ability to stop minor oil seeps effectively.
Key specs
- package dimensions:8.22 x 4.6 x 12.66 inches
- oem part number:881163
- flash point:N/A
- viscosity:N/A
- vehicle type:N/A
9.3

Excellent

Our Rating

9.9
Sheerness

9.7
worth the money

9.7
distance
5

Valvoline
Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT

25% Off
Main highlights

Superior Engine Protection
Valvoline Advanced Full Synthetic 0W-20 offers excellent engine protection and longevity.

Ideal for High Mileage
Perfect for vehicles covering extensive mileage annually.

Praised for Fuel Efficiency
Widely appreciated for enhancing fuel efficiency and performance.
9.1

Excellent

Our Rating

9.7
worth the money

9.7
Long life

9.7
distance
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6

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

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.
Key specs
- package dimensions:8.22 x 4.6 x 12.66 inches
- oem part number:881161
- flash point:N/A
- viscosity:N/A
- vehicle type:N/A
9.0

Excellent

Our Rating

9.9
Long life

9.9
distance

9.7
worth the money
7

Valvoline

Valvoline Full Synthetic High Mileage with MaxLife Technology 5W-20 Motor Oil 5 Quart

25% Off
8.8

Very Good

Our Rating
8

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.
8.7

Very Good

Our Rating

9.9
Long life

9.9
materials Quality

9.9
distance
9

Mobil
Mobil 1 Advanced Fuel Economy Full Synthetic Motor Oil 0W-20, 5 Quart
Main highlights

Fuel Economy Improvement
Mobil 1 Advanced Fuel Economy full-synthetic motor oil 0W-20 is low-viscosity to help improve fuel economy, meeting ILSAC GF-6 standards for engine protection.

Best for High Mileage and Extended Performance
Ideal for vehicles requiring high mileage and extended performance, protecting critical engine parts for up to 10,000 miles between oil changes.

Warranty and Quality Assurance
Customers frequently praise Mobil 1 for its legitimate warranty program and high-quality, full-synthetic formula that ensures engine cleanliness and protection.
Key specs
- package dimensions:4.4 x 8.1 x 12.66 inches
- oem part number:124185
- flash point:224 Degrees Celsius
- viscosity:0W-20
- vehicle type:Car, Truck
8.6

Very Good

Our Rating

9.9
lasts a long time

9.7
worth the money

9.5
materials Quality
10

Mobil
Mobil 1 European Car Formula Full Synthetic Motor Oil 0W-40, 5 Quart
Main highlights

Extends Engine Life
Mobil 1 FS 0W-40 enhances engine longevity, even in tough conditions.

Ideal for European Cars
Perfect for high-performance European vehicles needing superior protection.

Outstanding Wear Protection
Praised for its excellent engine wear protection in reviews.
8.4

Good

Our Rating

10 Best synthetic engine oils of 2025

1

Valvoline Extended Protection Full Synthetic 0W-20 Motor Oil 5 Quart

9.9

9.9

9.9

How do we rank?

How do we rank?

Analyzing top stores

2

Mobil 1 Advanced Full Synthetic Motor Oil 5W-30, 5 Quart

9.9

9.9

9.7

3

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

9.7

9.7

9.7

4

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

9.9

9.7

9.7

5

Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT

9.7

9.7

9.7

6

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

9.9

9.9

9.7

7

Valvoline Full Synthetic High Mileage with MaxLife Technology 5W-20 Motor Oil 5 Quart

8

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

9.9

9.9

9.9

9

Mobil 1 Advanced Fuel Economy Full Synthetic Motor Oil 0W-20, 5 Quart

9.9

9.7

9.5

10

Mobil 1 European Car Formula Full Synthetic Motor Oil 0W-40, 5 Quart

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