DON"T! use motorcycle oil in your car! 98% of the motorcycles out there have a wet clutch in them. Meaning that the engine oil is also the transmission oil too. and the clutch is bathed in it too. So the oil designed for that type of set-up has different elements in it. What's good in a car engine, is not good for the clutch plates in the bike. Over time the clutch will slip. So what's good for a bike, is not that great for a car motor. I'm keeping this simple.
Mobil 1 Racing 4T 10W-40 is recommended for 4-cycle motorcycles which specify the use a 10W-40 engine oil. This oil will help provide excellent performance in
motorcycle engines that are designed with a common engine/transmission lubrication system or where the engine lubrication system is separate from the transmission system. In the case of the latter, follow the manufacturer's recommendation for the type of fluid to be used in the transmission.
Mobil 1 Racing 4T 10W-40 engine oil is designed to help provide the proper frictional characteristics necessary for wet-clutch common engine/transmission systems. It has been fully tested, both on laboratory dynamometers and in the field, to help provide optimum horsepower and acceleration