I use the Honda GN4 10w-40 oil in my engine and the Honda Shaft Drive Hypoid gear Oil, 80w90 in the front and rear diffs. I like using the Honda oils also because IF Honda has any questions on what oil I was using I can tell them I used what THERE manual told me to use.
I have the 05 Foreman 500 and my manual says 2.5 onces in the rear and 6.3 onces in the front diff for a regular oil change. So I would say get 2 bottles and that should be enough. Some of the other members should know for sure.
For the engine oil, i've been usin' Valvoline ATV oil. It is just a tad more
expensive than Honda oil, but i don't want to drive clear across town to
get some atv oil when Autozone is half a mile from my house, if that far.
The Valvoline seems to work great. I actually save money if you figure in
all the gas it would take to get to the Honda shop & back home.
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