Steve you are 100% correct, I have been using airplane blend in pretty much everything for the past 8 years, never had any troubles with it. And actaully airplane blends usually have more oil then the RC car fuels do. and the kind im using has half synthetic and half castor so you get cooling and protection at the same time. If anyone is interested its called sig champion. it is indeed a marketing scheme, and if you go to a hobby shop they will tell you that airplane blend will destroy your engine so that you buy the more expensive "car fuel". I would never run my engine on fuel with only 10% oil!