I have a Pavesi and the oils are changed every 3 race weekends. I tend to do more sprint racing then road racing but oil is cheap insurance to me so it gets changed often. In the gear box I use amsoil and in the wet clutch I use Toyota WS trans fluid since I have alot of it. And if you want your trans to shift effortlessly I highly recommend looking into getting all moving/wearing parts in the gearbox REM treated. If you want to know more about REM treating or where to get it done http://www.taylor-race.com will be a big help.