BrokeCafe79
XS400 Member
I have an '81 xs400 and have been rider it a bit more and want to do my first oil change. Under the it says to use 20w40. All I can find at my local auto part stores is 20w50. Would it make any kind of difference if it is synthetic motor oil or nor? This is my first motorcycle and just not wanting to accidentally cause any damage. Will use oil stabilizer if it'll help with the non synthetic.