My sled had 2 scored cylinders and i payed 700 dollars to have it fixed. It scored becaue cracked airbox-carb boots and maybe some water in gas and cheap gas station oil. So last year i ran full synthetic Arctic Blue 2 stroke race oil(REALLY GOOD STUFF) No smoke, no ash, no stink its clean and said to be capable of 1:100 injection but its 10 dollars per quart. What are some other quality oils to use? The guy who fixed it said if i ran this oil it could not get scored again, the bottle says it prevents scoring. What about Amsoil Interceptor? Is it good?