Originally Posted by RotaxRider
I have a 2000 F650GS, which I could potentially ride this winter (Canada). What brand and grade of oil do you use in your bike? Do you change the grade/weight of the oil for the winter riding? (I'm currently running mine with Mobil 20w50.)
All my liquid-cooled bikes get the same oil, year 'round, whether I'm riding in Alaska at below zero temperatures or in Death Valley at over 100F - 5W-40 synthetic. Can't see any reason to put a high viscosity oil into an engine that has a thermostat to control the temperature, and the lighter oil flows better at start up.
But, oil selection seems to be a personal thing, with all too little reliance on what the manufacturers recommend. So run whatever makes ya feel good.