This is a fuel related topic. My tuner told me that 91 octane in my state isnt going to allow me to make my power goals. Due to season he also said that e85 content changes. Great, now im left with buying it online. My tuner suggested ethanol one but it seems there are 3 types and im confused with what I need. The goal is around 400hp. Setup: d16y8, 1300cc injectors, aem e85 340 pump vitara setup. Also do I need a new mahle fuel filter for the e85? I just replaced it less than a 1k ago. If I get a tune with with ethanol one does that mean I can only run that specific fuel? Or could I use pump e85 after?