everyone has different option on oil.....

iv been reading around and seen everyone has different option on oils and filter's i personal use k&n filter and the valvoline race oil i cant think of the name ill look tommorrow. But anyways whats the most commen oil used in bikes i have a 2004 gsxr 750 stock internals but i drag race it. Is there a better oil to pertect the engine for the taugh times on my bike then what im using and what other people like...

Oh come on, you can see there are a million opinions and you should be able to figure out what oil to use from reading these threads.