Regular Gas

I've been thinking about this subject on and off for a couple of months.
One problem would be replacing all the rubber hoses and gaskets the fuel comes in comtact with. Methanol and Ethanol are both polar solvents that will cause rubber to swell. The fuel lines could be replaced by copper. The gaskets would need to be replaced with something like Viton.
The tank would need to be replaced with somthing like polypropylene. The alcohol could cause a steel tank to rust.
You would have to be very careful about water getting mixed with the fuel.
And finally, you would need to adjust/change the jets in the carb.
These are just things I've considered and aren't the end-all-be-all. I suspect there would be better materials than Viton and Polypropylene for the uses above. I just haven't researched it. Anyway...