so i know more about 2 stroke snowmobile motors than 4 stroke bike motors, so in a sled motor you cannot use any sort of synthetic for the break in. it will cause the rings to not break in right. so for the first hour or so i have casterol 10W30 in it. is that a good oil to be running? its not synthetic, and im going to the sand dunes this weekend and im wondering what oil you guys think i should put in it.