I also have a 150cc, and use only non-ethanol gas. To me, I'm saving more in gas mileage than I'm spending on that extra gas price (especially over my 12 mpg F-150 gas sucker), and it really keeps the gunk from building up in the tank and the carb that you get with ethanol gas. Also, I throw in some Seafoam every month to keep the carb clean. If it means the scooter runs better and longer, I will spend a little extra on the non-ethanol gas, no question.