Yes, air cooled is key. I found some gallon jugs of Multi Purpose Pennzoil at my local Walmart but eventually learned it was not air cooled. I called Pennzoil and learned several things. They no longer sell Air Cooled in gallon jugs and according to the guy on the phone, the air cooled oil in the 3.2 ounce bottles is not the same as the air cooled oil in the 8 ounce bottles. Don't know what the difference is but that's what he said. He initially asked me if I had a Rotax engine and told me that they only recommend the 8 ounce bottles of air cooled for them. He also said that they are coming out with an oil blend for Rotax.




Mike