-Pennzoil Pure Plus Ultra 5w20
-OEM filter
-Cold air intake
-ECU tune
-93 octane
-Always used MMO or Lucas UCL at every fill up
-Engine always saw near the redline when fully warmed up
-Frequent high RPM operations
-Very frequent short trips (under 1 mile up to 6 times daily, 5 days a week)
-Mostly highway miles
The oil surprisingly wasn't dark for having over 11k miles on it. The past sample was Edge EP 5w20 and I think mile for mile, the Edge will hold up better in my specific engine than the Pennzoil. I intended to do a 10k interval but got busy so 11k happened.