just got back from my dealer and they told me to use honda's 2-stroke racing transmission oil its 80/85w. They say they use that in all there 2 strokes. But before my other edaler said to use Motul 10/30w 4 stroke transmission oil. I stumped will the honda oil work just as good. BTW the book says to use 1.6 us quarts. but i heard to dumped in a full 2 quarts