Incorrect. GM spent millions of dollars developing the oil life monitor. Lots of oil analysis done examining factors like engine load, engine temp, operating time, mileage, etc. It's quite accurate. I had my analysis done on some dino oil when the oil life monitor said about 10%, and the analysis agreed. It can be trusted.
ive heard different but your a pretty knowledgeable guy so i guess i stand corrected
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E85|GenV|3.2|#65's|1.95 YT RR w/105's|Pacesetters|N*/LQ4|PRJ rewire/255lph 13.2 @ 104. No Cam No IC.