Originally Posted By: Brons2
Originally Posted By: SR5
Nice report. Distance was 8,700 miles and with only 12 ppm Iron, 7 ppm Copper. That's good.
The TBN was 2.1 and the KV100 = 8.17 cSt, so still in grade and some life left in the oil.
Valvoline / Napa can go the distance.
No, not in grade for a 5w30, not close. Not atypical for a 5w30 to shear down quite a bit, just pointing out that your statement is incorrect.
The engine didn't seem to mind the viscosity reduction at all. The newer Pentastars call for 5w20, I believe.
It's in grade for a 5W-20, which is what he was running.