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#20 (permalink)

04-04-2020, 08:15 AM

MKS427

CC Member

Join Date: Jan 2017

Location: Glendale, AZ

Cobra Make, Engine: FFR MkIV 427

Posts: 641

Not Ranked

Craft recommended/required for warranty Joe Gibbs Hot Rod oil 10w30. The explanation for high zinc, in a roller motor, high spring pressures essentially squeeze the oil out while the motor is off. Zinc clings to the parts, preventing a "dry" start. That's what I was told, anyway. A lot of the guys also use Valvoline high zinc, I believe it is called VR1, not 100% sure.

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