I've ran Wal-Mart synthetic 10-40 oil in my Burgman 200, Buddy 125 and Honda Silverwing scooter. Good stuff at a fair price. Gear oil (aka-reduction box) is as close as I can find in weight/any brand. In my Yamaha Zumas I run Wal-Mart 10-30 synthetic in the reduction box. In my new scooter I have it serviced by the dealer. Have no idea what they use but when I check it to see if it needs topping up, its GREEN!? And note that this is a air cooled motor! I trust them and I rode home 100 miles in crazy hot and humid weather and its been fine. Just strange....
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