Have any marinas near you?
I recently switched to E0 gas for my yard equipment. No question they run better.
Tried a tankful in my car thinking it may be cost effective to pay the .30/gal more for an increase in mileage.
I didn’t notice any mileage increase. 1/10 mpg at best. Went back to E10.
What kind of car are you driving? In my own analysis I have found an eight percent reduction in mpg when I was forced to switch from straight gasoline to ten percent ethanol. That seems to be the figure reported by most who have done the comparison carefully. I have heard some claims of a twenty percent reduction but eight percent seems to be reality. It seems to be the case that you can go almost as far on nine gallons of pure gasoline as you can go on the same nine gallons plus a gallon of ethanol blended in. Of course if you are like some people who use cruise control at all times on the open road you are wasting a lot of gasoline anyway.