TenBest

10 Best Synthetic Engine Oils

Updated December 2024

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Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic Motor Oil, Green , 5 Quart

Castrol

9.9

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Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil, Easy-Pour 5 Quart

Valvoline

9.4

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Castrol 03060 GTX MAGNATEC 0W-20 Full Synthetic Motor Oil, Green , 5 Quart

Castrol

9.3

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AmazonBasics High Mileage Motor Oil, Full Synthetic, SN Plus, dexos1-Gen2, 5W-30, 5 Quart

AmazonBasics

9.0

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Castrol 03124 EDGE 0W-20 Advanced Full Synthetic Motor Oil, 5 Quart

Castrol

8.5

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Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil (1 Gallon, Single Pack)

Shell Rotella T

8.3

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

Valvoline

8.0

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Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil (1-Gallon, Case of 3)

Shell Rotella T

7.6

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

Valvoline

7.4

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Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil

Shell Rotella T

7.0

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