I’ve been riding and driving for over 40 years. I have always used a good quality name brand oil and ran the manufactor recommended viscosity for that particular vehicle. I have never had an oil related failure with any vehicle because i change it when the manufactor says to. Synthetic, non-synthetic, motorcycle only oil, which do i choose? The point i’m trying to make is in my opinion as long as you use the right viscosity and choose a good quality oil and change at the recommended intervals along with a quality filter there should be no debate. I think this topic gets beaten to death for really no reason.