I have seen a few different posts but I am not seeing what I am looking for. I have a 2005 escalade that has the master enable/disable in the editor. This escalade was not a FFV. I have been looking around the forums and have found that the 2002 Tahoe file is what is needed to run flex fuel. So I downloaded one from the repository to look at what options I am missing compared to the original escalade file. I notice no extra options for tuning or options for tuning for flex fuel. in a place with around 750k people, we only have 2 stations with e85 pumps. I would like to run e85 when I am going to the track but not for daily driving. Is there a different file that I need for this to work? Is this even possible? If I don't have to change the file or os how would I tune for e85?