Quote Originally Posted by Mr.Ed View Post
I think it all depends on what you're running and how you're running it... We can't say that someone running Motul 3100 and doing 44s on the GP circuit onboard of an old cbr250 (in all its 18000rpm glory)should change the oil every 500Ks. I would think that's equally stupid as running 300V, doing 58s on a modern sportbike and changing it every second track day.

Overall, I think 'common sense', the rarest of all commodities, is required here.
True words.

So far I'm finding that the Ape needs the oil changed probably 4 times as often as the R6. Two days on track and it's filthy and very much in need of changing. Whereas the R6 will do 8 days and it still looks fresh. Although most of my days so far have been race days on the Ape.

Race starts have a HUGE effect on oil condition. Multiple times destroying the oil with slipping clutch plates ruins the hydrocarbon bonds and breaks down the oil much more quickly than normal wear. Even more so if you slip the clutch a long way (as some people do, although I don't).