Maybe it's just me but 1 gal of oil to 30 gallons of gas don't seem like it's too much. If you were premixing 30 gallons at 50:1 you would mix in 5qts of gas to get the ratio correct. So your motor burned a little less than a convential 50:1 mix. Seems about right to me. I would rather one run a little oil rich to keep it from going boom as long as it is not fouling plugs.