I hadn't considered 2 cycle oil or any "blend" of oil/gas. I learned something today! Thanks.I am using a 10% mix of WD40 and gasoline the same I run in my hit miss engines.
I have found that many of the 4 cycle model RC engines do not have oil in the crank case. They rely on the higher mix of oil in the fuel to lubricate the lower end and the crank cases must be vented to remove the excess oil that accumulates.
Ray