I recently went snowmobiling in Canada with some buddies and met some new people, one guy being a worker/engineer for Polaris. We got talking about new technology and finally power valves and how they require so much maintenence. He thinks its funny how some snowmobile and dirtbike junkies rip out and clean their powervalves every 10 hours of riding. According to him, he said it doesnt matter what oil you run, $1 or $100 a quart but more what gas you run- the higher the octane the better it is. On one hand, this makes sense because the higher the octane the better it burns, the more it burns, less left over to get thrown into the powervalves, but on the other hand there must be some logic to dirtbikers and snowmobilers cleaning their powervalves all the time. So tell me, does this stand true for snowmobilers, maybe because they have oil injectors and because dirtbikers mix their oil (that seems to make sense) or is this guy full of crap?