Hi buell248...Congrats on the Buell! :up: I just got my first Buell earlier this year ('09 XB12Ss). Went with an HD oil filter and HD Syn3 in both holes for my first oil change. So far no complaints. But, I'll likely go with a different synthetic oil next time just to save a little money (it's like $15/qt for Syn3...ouch). I think all oils (synthetic or not) are so good these days it's hard to go wrong. But, there are a lot of folks on here who have more Buell experience than me who may have a different opinion.