I know I'm not the first person to mention this, but too much "zinc" is a bad thing. If you take a high-zinc oil and put more in it that may -- or may not -- mix properly w/ the base oil, how are you going to know when you've passed the "Ooops..." point?
To little or to much, which would you choose. I know I just went 4 years with a .650 lift solid cam and it runs as good today as the day I put it in. Same spark plugs too. Lol.
