Forum Discussion
jaycocreek
Feb 09, 2021Explorer II
Specta wrote:
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.
I've read it both ways,some say there is still enough zink in modern oil and others say no..I read for a long time on Bobs the oil guy and many claim lack of zinc was the cause of failure...I only have 91k on the old 460 and thought I would use it buying on special because us spendy...My old 390 heads went south because of non leaded fuel in the '76. Engine so it was either ad an additive which some say doesn't mix all the way or a factory blend in..
It's a racing oil in a 460,seems only natural huh.:B
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