Forum Discussion
specta
Feb 09, 2021Explorer
jaycocreek wrote:
Changed oil in my truck and trying some Valvoline VR-1 in the old warhorse with a flat tappet cam...Oil these days don't have enough zinc in them compared to when my truck was born..
Zinc is critical during break-in for a flat tappet cam.
With the miles you have on yours I don't think its an issue.
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