Quote:
Originally Posted by elmariachi
I do business with several oil companies here in Houston and the few engineers I have spoken to agree with Jim above that 1200-1400 is plenty and beyond that there could be corrosion issues. I am running Valvoline VR-1 straight 40 in my new S/O and it has 1400 ppm of zinc.
Patrick, you note thatyour engine has 4k miles now, did you happen to do a Blackstone when it was right off the dyno for comparison? |
No, unfortunately I do not. But I will tell you from my experience in discussing these matters with other engine nuts who send their
oil in for analysis, the results of these tests are notoriously wrong. Identical samples sometimes come back with vastly different numbers.
Mostly, I like to see a reasonable
zinc & phos number, and no water or
antifreeze in the
oil. Other than that, I take everything it says with a grain of salt.