Engine oil

1wild&crazyguy said
And this helps him how?

you mentioned zinc.. get off your frickin hi-rise gold plated crapper already.

running 20/50 on a .002 clearanced bearing helps the OP how?

so i guess by your theory there should be MILLIONS of cams right now failing left right and center becouse the zinc content is less the 1000ppm?
puh-lease. hi load valvesprings and/or a lack of oil/oil control kills camshafts.