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 5w30 for anything under 32 degrees. Anyone have a good 5w30 synthetic oil recommendation? I will get a used oil analysis done on this oil too.