I've been putting the 10w-50 semi-synthetic oil in the machine. In fact, just did the oil change in early December and then the gas top-off, bit of stabil in the tank, and hook up the Battery tender. My put-to-bed routine. Took the bike in Thursday. Dealer said the recall only replaces with the basic grade mineral oil. If I wanted the semi-synthetic, they'd have to charge me for it. Ok,... pisses me off a little, having wasted the time and effort and cashola to have done the work in December. I'd be happier if mama-yama considered details like this. Just a little bit of abuse. I'll put her back on semi-synthetic this late fall. My 05 was fine on the basic oil for 62,000+ miles.