Cant believe I am thinking of the oil for the snowblower! I bought it new, ran it about 8 hours on the factory oil, then changed it this March with Mobil super 5000. Plan on changing that oil by November 1st as the manual recommends synthetic 5w-30 for anything under 32 degrees. Anyone have a good 5w-30 synthetic oil recommendation? I will get a UOA done on this oil too.