The websites I found were a little over the top, and I couldn't find one to download anywhere. So, I decided to make a simple calculator using Excel and though I'd share it.
I run e85, so this is a nice tool to help determine the fuel percentages and combine ocatate rating based on how much of each fuel you put in the tank.
It's easy to use, enjoy. Just alter the values in
RED, everything else calculates.
[Revised]
https://docs.google.com/file/d/0B66v...it?usp=sharing
