MO.RR
Well-Known Member
Getting ready for a cam swap and have some penngrade 10w-40 and a bottle of Howard’s zpm additive. Can I use just the 10w alone, 10w with zpm additive, or get true break in oil? I think I heard at one time that adding too much zinc is actually bad On bearings but I can’t remember.
Forgot to mention it’s a hydraulic flat tappet.
Forgot to mention it’s a hydraulic flat tappet.