My sv6 is just be turned for 95 and will run just as good with 98.
On to my second tank of E85 and will get a tune for that next.
I found every though it is not tuned yet for E85 it has a bit more grunt so after the E85 tune it will run much better.
So with the Flex Fuel E85 you should still notice a improvement.
E85 tune finished 23/12/2014
Motor running very well.
Thanks to Steve Bennett
https://www.oztrack.com.au/