If you get race gas make sure to check its specific gravity. 927 castor will separate in fuel with a specific gravity below .730. I'm not sure if mixing in 93 pump gas will prevent this separation and if it will what mixture to use. I plan on running Sunoco 112 and its specific gravity is .723 so I'm either going to research an acceptable mixture of 93 to keep 927 separated or I'm going to run AmsOil dominator synthetic.

Give all fuel and oil mixtures the "jar" test until you are satisfied that the type of fuel will stay mixed with the oil at the temperature you will be using the premix.