o i believe it can be done. just not on the tune i have now, not sure if the fuel being e98 containing 13% more ethanol has anything to do with mpg’s Beings that you have to add 30-40% more fuel for e85 i would think e98 would be more like 40-50% more fuel than petrol. Plus as always Evans tunes are way conservative. on the other hand your car has to be a beast at 40psi. How does your drivetrain like it? What turbo are you using?
As previously stated i bought my fuel from rockett brand race fuels it was $450 shipped to my door for 55gal drum. They do make ethanol test kits that measure the amount of ethanol in a batch of fuel. If you are going to be daily driving your car i would not reccomend switching to ethanol. If its a weekend warrior at the track and on the road its a different story.