Okay, thanks for the advice, everyone. Threw the various opinions in a blender and came up with this plan: change out the OEM oil at 100 miles with a good quality "dino" oil. Change again at 300, then at 600, then go full synthetic at 1000 miles and every 1000 thereafter. Probably overkill, but like Stig says, oil is cheap, especially since I will do it myself. Our new scoots are arriving this Saturday! Oh boy, we gonna have us some fun now....