Sent several samples of different synthetics to Bobtheoilguy....

Mobil1....Mobil1 EP......Pennzoil Platinum....Castrol syntec

Bottom line..... I have been running the Pennzoil Platinum since the 4th oil change & have never looked back. It's also a steal @ under 20.00 for a 5Qt container @ WalMart

I change it @ 4k.....10w30