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so, how high of a zinc content should we look for?

RonA said:

So the ZDDP additive needs to be used all the time, not just for break in?

Ron

Click to expand...

op:op:op:

I did some looking around, here are the zinc contents of some common oils.

Delo 400 Multigrade 15/40 (the older good stuff)
1480 ppm

Delo 400 LE 15/40 (the new stuff)
1300 ppm

Lucas High TBN 15/40
1400 ppm

Redline 20/50(CF)
1330 ppm

Redline 15/40
1320

that is allI have for now

COMP Cams recomends over 1200 ppm

this is interesting...check out the depletion chart

http://www.zddplus.com/TechBrief8 -...try vs. the Aftermarket Viewpoint on ZDDP.pdf