Quote:

I sent in two samples (one new and one used) of Valvoline VR1 20w-50 racing oil for analysis at the local Caterpillar oil lab. This is thier SM rated oil, part number 211 that they claim has extra zinc.
Results for the new oil sample in ppm
Al-0 Ca-2121 Cr-0 Cu-0 Fe-1 Pb-0 Mg-21 Mo-0 P-1049 K-5 Si-4
Ag-1 Na-0 Sn-0 Zn-1182
The used oil sample had Zn-1172



The oil guy that talked to us the other night is big on oil analysis. His suggestion was to always send a control sample along with your current one, so you know what you are getting back. He gets good results from using Stavely for his analysis work. If you send a known second sample and it comes back vastly different from the first time, you know something may not be right, and you may need a retest.

When you look at the high reading for Ca, that must be the calcium as part of the detergent package.