Just a thought but there have been several posts about changing the SC oil. I think that this should be something that anyone doing a mod with pulleys, ie. larger crank pulley, small SC pulley or both, should consider as part of this mod. Any additional load on the SC should be addressed, so I will do mine with the MOBIL 254 jet oil as soon as it warms up, along with my annual spring oil change using Royal Purple 0W-40.