Pennzoil makes a new oil called "Outdoor", but I don't know how good it is. They quit making the original "For Air Cooled" because the EPA kept outlawing or restricting (thus raising the price out of sight) the ingredients they wanted to use and they had to keep re-formulating the oil. I understand the same (or similar) oil is now made by Shell under the "Aerosport" name. Luckily I'm still working out of a large stock of the original "Air Cooled" oil that I had, but it is almost gone unfortunately.
Good luck with the contest and your engine. I am sure it will hold together that long, but severe ring blow-by can cause the rings to eventually carbon up and stick, and/or overheat the piston skirt, burn the oil off, and cause seizures so keep an eye on it.
AV8TOR
Last edited by av8tor1977; 07-26-2014 at 01:23 PM.