Just an FYI - I switched my S2K over to synthetic today (11k mile oil change) and it worked out really well at Honda of Mesa. I bought the Mobil 1 oil at Costco, Mobil 1 oil filter at Autozone (thanks Gloffer!) and only paid $9 for the change at Mesa. They were very accomodating and even left the empty bottles back in the case as proof. Total cost = roughly $44 - not too shabby! The only disadvantage was no open service bay like Gilbert, but since they are run by the same people, everything seemed pretty smooth.