I'm going to change the oil on my R1 by myself for the first time, and I was wondering what type of oil I should get. I have 4 qts of 10w 40 Castrol Synthetic oil that I bought for my 260Z, and I want to use that. But someone told me that oil for bikes is different than oil for cars. Is this true? what happens if I use oil for a car on my R1, will it work?