Hmm,....you say I should only use Amsoil 75W140 for my final drive? Disregarding BMW's probably vast knowledge and testing of proper fluids? Disregarding the 175,000 miles I have on my original, untouched rear final drive on my 94 RS, all run with synthetic 75W90 gear lube, and no problems? Thanks just the same but I know what works for my bike.
Happy is certainly nice but "cooler"? Doesn't the thermostat regulate the temperature until it is wide open? Does this snake oil know how to pry the thermostat open wider?
Originally Posted by bmwmotorwerkz