If you try it, make sure to track your mileage and report back. My guess is you will get 75% or less of your normal mileage.

 

Without knowing more about the particular vehicle, if you have converted the vehicle or if it has ever been converted to run on gaseous fuels, you lose the ability to run on Flex Fuel on most conversions. When dad's 2015 F350 was converted to bi-fuel, he lost the ability to run flex-fuel.