Bill, I agree with you. However, I have one concern: I would like to keep using the recommended viscosity of 10W40, but NOBODY makes fully synthetic oil for auto in that viscosity. Bike specific oils obviously do. Higher viscosity (like mobil1 15W50) are going to be too hard on the oil pump, and less (like 10W30) also think is not a good idea either. I probably will use the mobil1 for bikes if I don't find one for cars. Any info?