Clois,
May I?
I assume you will get dozens of responses, all of them different.
My experience with Mobil 1. Never used the stuff before but since chrysler ships it in brand new Vipers I decided they certainly knew more than I did, thusly I left it in our Viper motors.
When we burned our motor up doing skid pad testing, I was really impressed with Mobil 1. We essentially removed all existing
oil, shoving it into the valve covers. The front two rod bearings did start to self destruct, but only after the two rods turned blue more than half way up. The bearings never spun! Many people I know were shocked the rods weren't thrown, and the bearings did not spin. Heck it was still running when the driver brought it back to the trailer.
And, it would still restart! Damage assesment:
Two new rods, the original crank was turned and polished, new set of bearings through-out.
Conclusion, all my vehicles, including the bikes now carry Mobil 1.
DV