10 Best synthetic motor oils of 2025

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Best Choice

1

Shell Rotella

Shell Rotella T6 Full Synthetic 10W-30 Motor Oil, 1 Gallon (3 Pack)
9.6

Exceptional

Our Rating
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Value for Money

2

Pennzoil
Pennzoil Ultra Platinum Full Synthetic 0W-40 Motor Oil, 1 Quart (6 Pack)
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.
Key specs
- viscosity:0W 40
- package dimensions:9.5 x 9 x 8 inches
- oem part number:Chrysler MS-A0921 SRT
- vehicle type:Car
- flash point:N/A
9.5

Excellent

Our Rating
3

Mobil

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

16% Off
9.4

Excellent

Our Rating

9.9
Long life

9.9
distance

9.7
worth the money
4

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.
9.1

Excellent

Our Rating

9.7
worth the money

9.7
Long life

9.7
distance
5

Valvoline

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

25% Off
8.9

Very Good

Our Rating
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6

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.
8.8

Very Good

Our Rating

9.9
Long life

9.9
materials Quality

9.9
distance
7

Mobil
Mobil 1 High Mileage Full Synthetic Motor Oil 0W-20, 5 Quart
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.
8.6

Very Good

Our Rating

9.9
Precision

9.9
distance

9.9
Sheerness
8

Castrol
Castrol GTX Full Synthetic 0W-20 Motor Oil, 5 Quarts
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.
8.5

Good

Our Rating

9.9
distance

9.9
Long life

9.7
worth the money
9

Castrol
Castrol EDGE 5W-30 Advanced Full Synthetic Motor Oil, 5 Quarts
Main highlights

Superior Viscosity Breakdown Protection
3X stronger against viscosity breakdown than leading full synthetic oils.

Ideal for Modern High-Performance Engines
Perfect for engines needing high temperature and wear protection.

Praised for Engine Smoothness
Customers frequently note improved engine smoothness and performance.
Key specs
- viscosity:5w-30
- package dimensions:4.33 x 8.27 x 12.99 inches
- oem part number:03084C
- vehicle type:N/A
- flash point:N/A
8.4

Good

Our Rating

9.7
worth the money

9.7
Long life

9.7
distance
10

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

17% Off
Main highlights

Superior Viscosity Resistance
3X stronger against viscosity breakdown than leading full synthetic oils.

Ideal for High Performance Engines
10X better high temperature performance, perfect for demanding driving conditions.

Extended Oil Change Interval
Protection for 10,000 miles between oil changes, reducing maintenance frequency.
8.3

Good

Our Rating

9.9
Sheerness

9.7
worth the money

9.7
Long life

10 Best synthetic motor oils of 2025

1

Shell Rotella T6 Full Synthetic 10W-30 Motor Oil, 1 Gallon (3 Pack)

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-30, 5 Quart

9.9

9.9

9.7

4

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

9.7

9.7

9.7

5

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

6

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

9.9

9.9

9.9

7

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

9.9

9.9

9.9

8

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

9.9

9.9

9.7

9

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

9.7

9.7

9.7

10

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

9.9

9.7

9.7

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