19-09-15, 06:24 AM
You got six owners offering opinions - all valid, I hasten to add - so that's not exactly a vast spread of responses. 
Which oil is best is an almost impossible question to answer. There are literally thousands of oil threads on bike forums world-wide and none give a definitive solution. Mobil 1 is good oil, as are 99.9% of the semi-synth and synth brands out there.
So long as you use a 10w-40 semi synth (or synth, if that's what you prefer) and change it regularly according to the Yamaha specs, your engine will run happily on it for 200k miles and more. You may find one which you think makes the gearbox feel nicer, or seems to make the motor run quieter/smoother/faster/delete as applicable in which case that will be your favourite - simple as that.
Which oil is best is an almost impossible question to answer. There are literally thousands of oil threads on bike forums world-wide and none give a definitive solution. Mobil 1 is good oil, as are 99.9% of the semi-synth and synth brands out there.
So long as you use a 10w-40 semi synth (or synth, if that's what you prefer) and change it regularly according to the Yamaha specs, your engine will run happily on it for 200k miles and more. You may find one which you think makes the gearbox feel nicer, or seems to make the motor run quieter/smoother/faster/delete as applicable in which case that will be your favourite - simple as that.