Bought a Mastif a month or so ago with 1,000 km on it. Since it needed oil topping up, and I didn't know what was in it, it made sense to do a full oil/filter change, start from fresh and learn a little about the bike. What a convuluted set up! Still, easy enough, but quite time consuming.
Now with a fresh charge of Motul synthetic in it, it is quieter and faster. It also gets better gas mileage, lowered my taxes and attracts ugly women (well, it is a Mastif after all).