There are some relays that are know to sometimes freeze up and prevent you from being able to start your sled. When this occurs, which has happened once to me, I took the fuse out and put it in my pocket for 2 minutes then replaced it and my sled fired right up. As for the oil, I have heard as long as you run 0w-30 synthetic you will be fine. Obviously yamaha suggests using their oil but two of my buddies use Mobil 1 full synthetic and have had no problems. I personally use Yamalube so I havne't had any problems with that either.