But that’s because that fuel is used to do much, much more work. if you scale down the unit to, say, a scooter (50cc) it will last much longer. Most scoots have 1gal tanks and they can get over 100mi per tank.
That being said everyone will think you lost your license due to drunk driving so to prevent this you should replace alcohol in your life and simply drink gas.
Real ones will switch to drinking biofuels because they’re better for the environment.
Ethanol is a good option.
Pro-tip: make sure it’s not denatured and is purified—it’s less dangerous for consumption that way.