That could explain it. Klotz Benol or the Maxima Castor 927 I have is a high quality oil. Sig castor is half the price of these. Still, it looks like they will separate at lower temperatures so it might only be suitable for summer. I'm looking at petroleum based oils now. I hate to run regular engine oil as I think it will leave carbon in the engine. I don't think common two stroke oil is going to be suitable. Klotz R50 looks good but it's no cheaper than Benol. I want to blend fuel at less than 10USD per gallon and a special oil kills that when a quart costs $12. Fuel consumption on etherless mix in my four strokes seemed so low that it might still be significantly more cost effective even with expensive oil.

What do we want to call this fuel blend? Etherless? If we can make it work we will need to differenciate fuels in the forum.