Originally Posted by biz77
There is no lie being propogated. I don't care what the AKI rating is, E85 tunes more like C116 race gas. 100 octane AKI unleaded gasoline cannot come close to what E85 does. Spend some time outside of the BMW forums where people have been tuning on this stuff for the last 5-7 years and you can see multiple examples of how E85 performs similarly to something like C116 or Q116.
And the articles for which I provided links explain why this is the case.