Hey Gas Man...almost all of the V twin stuff on the market, including the Amsoil stuff is for harleys. That is why is it 20w50. Xz636 the Amsoil synthetic is great stuff. I used to change my oil every 3000 miles in the TL and it would come out almost the consistancy of water. I ran Amsoil all last season without an oil change. When I changed it last week for the new season the stuff that came out was basicly the same consistancy as the stuff that went in. Not to mention that the bike shifted better. I actually had to adjust my shifter because I would accidentally click off gears. I love the stuff.