Engine oil

[Slaninar]

Feel free to fill your bike with the latest super high tech API SM, but you might not feel so great once you find your clutch is wrecked and you need to get your bores honed and new rings fitted.

I go higher: API SL. No problems with clutch, or engine. It is BETTER, not worse, you know?

About 10 years ago I was doing some building work for someone who supplied oil to the F1 racing teams, what he told me was that the oil they used was different than what you buy, and cost much more something like 5 times as much, don't know if this is the same in bike racing, anyway on a ride out of say 150 miles how much of that is your engine revving at over 12,000 rpm, not that much or if it is I want to know that ride 8)

Racing oils have less corrosion inhibitors - they are made for heavy use (hot, high revs), but with more frequent changes.