There is a massive market waiting here.
Maybe now finally aftermarket engine management systems will be allowed!
in most cases they can be tuned to run spot on, cleaner and better running engines which equal power and a saving in fuel.
Most new cars can be flash tuned and are ready to go be tweaked, some older cars can possibly have the stock ECU tricked to run the e85.
But installing an aftermarket ECU on a skyline, vl turbo, supra ect should give both sides a win EPA vs Tuner.
Having this aftermarket flexibility will a lot plugin\switch flicking fuel selection depending on availability.
Some things of issue that should be looked into would be:
(if you know the answers please post)
Effects on Catalytic converters.
Engine parts and seals.
AFR changes going from 98RON Premium to e85
Emissions
Cylinder and exhaust Temperature
Effect on Injector Spray characteristics
Burn speed and temperature
“add more”