400ex oil change

[fst400exrider]

I need to change my oil and the oil is up to the lower part of the dipstick. I was wondering should i change all the oil or just fill the tank up? any help would be appreciated.

[kerby400ex]

When in doubt, change your oil. Your quad will thank you :D

[fst400exrider]

Thanks man......and its 10w-40 oil right?

Originally posted by fst400exrider
Thanks man......and its 10w-40 oil right? i use 10w-40 in winter/cold weather and 20w-50 (or 40???) in warmer weather...