Have owned our '95 SE 12 yrs. Use Valvoline 80/90 Full Synthetic r/e lube. Change every riding season. VERY IMPORTANT TIP: Yours truly uses small baby bottle, marked @ 4.7 oz., to put EXACT amount in via funnel/hose. NEVER overfill, or you may blow oil seal & NEVER overtighten fill cap[they're very fragile!]. You may also wish to FLUSH r/e. If lube appears very dirty, I fill, go on about 10 mile ride, drain/refill & repeat, until oil is clear after ride. Oil is MUCH cheaper than a new rear end! My 2 cents.....papasmurf