Stabel has an ethanol product on the market.
I've used Kemco octane boost and itappears to help, gotta love lead. 1 qt of the Kemco to 10 gal. bumps 92 oct to 100.
The fuel can also eat some seals/gaskets if it sits stagnant in the system. In carbed 4 stroke off road bikes and atv's it clogs the small orifices in pilot jets pretty fast if they sit a month or two. It's also been screwing up lawn and garden equipment for some time now.
Brilliant concept forced on us by clueless "leaders."
Here's a good article regarding the cost efficiency vs. energy:
http://www.motorcyclistonline.com/fe...uel/index.html