Engine oil

Owner reviews for engine oil

Manufacturers
VALVOLINE Engine oil

I used to use Rotella T4 as recommended by many on the forums. It was fine but I switched to Valvoline 20w50 because it has the additional Zinc like the Rotella T4, and a bit better film strength which protects bearings at high RPM.

Pros: better film strength
Vehicle: Mazda
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