You are right. It sounds stupid but alot of teams use it. They will go as far as to put it in the bottles of the company they are sponsored by.I am really happy with silkolene but have also heard of some guys using shell rotella
it is 15w40. i was told that the harley davidson oil was pretty much the same as the rotella 15w40. they are air cooled engines, and they are subject to a lot of heat. i am going to start running it in mine on the next service, and has any one had any good or bad luck with the reuseable oil filters.I would like to start useing this oil. Is there differant weights? What do I need to ask for when buying this oil? Will this void my waranty?