well it must suck to be me then... I have a 450r and I change my oil prob once a month because i ride so much. The oil I use is a full synthetic with all the necessary specs, in fact the oil is blue not that that matters. But its 6-7$ a QT i just dont feel right using 99c oil I use in my car ( I actually use Mobil 1 Synthetic in my Car so its not 99cents) but anyways spend a few extra bucks make you machine feel better.....

 

well there are allot of use who use the sythentic oils and to be honest I had three atv's my newest being 2006 Honda Rincon and still using same oil, but I run my ATV enough I ususally have to change my oil 4- 5 times a year.
one place you might want to check out is a site called .
http://www.rinconriders.com/
we have a debate going on right now on amsoil oil , but there are many good oils they have all most of them listed.
this is a direct link:
http://www.rinconriders.com/index.cf...d=38115&page=2