I have a 2000 400ex and i was wondering how long does you guys's oil last when you go riden. I run honda gp4 and it doesnt last very long at all? When you feel it inside the bottle it feels like water and thats not good?

 

oil is oil. there are different grades of oil for different temps. but honda oil is the same as valvoline,penz,and havoline....ect.
i quite using the honda oil and went to penz. 20w-50. rather then something like 10w-30.
20w-50 is thicker and will keep seals and metel parts more lubricated under hight temps.
if i was you i would quite using that honda stuff and go to something like penz. or valvoline, and go with something thicker. yes that honda stuff is like water. just my thoughts
paul