Yep, strangely one of the rare places where a market-based solution would come to the same answer as everyone else. Literally nobody involved would want to deal with the fallout of actually going through with it, so if somebody really wanted it sold, it would have to be something that they made mandatory to sell, which would likely result in lawsuits from automakers and gas stations who themselves don't want to be sued, and then no one would end up wanting to buy it because it's three times the price of regular gasoline and the only "coal rolling" you could do with it is in the tow truck bringing your ass straight into the shop to buy a new catalytic converter after you broke your car and now it won't turn on anymore.