It says in the manual for those that the oil in the engine is just a shipping oil and it is recommended that you change it. I'd change it just to be safe. You can use a straight 30 weight oil at temperatures above 40 degrees so you'd be fine with that, otherwise I'd run 10w-30. For break-in, personally I change the oil about 4 times in the first hour and then once each hour for the next few hours. There is so much metal shaving in the oil at first I think it's best to get it out of the engine.