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oh okay i actually never thought of it e85 is everywhere where i liveMakes it a lot easier to figure E85 mixture using the formulas available. Otherwise I am just estimating how many gallons are in the tank.
I haven't checked on this vehicle but on every other vehicle I've owned 1/2 tank on the gauge doesn't actually correspond to 1/2 tank. My old Mustang when the gauge got to 1/2 tank there was really about 1/3 tank remaining (based on miles I could drive before 1/2 tank and miles I could drive after it reached 1/2 tank). I would fill up the tank full sometime when doing a highway trip. Then note the mileage at each 1/4 tank according to the gauge. That will allow you to tell you how accurate the gauge is in terms of percentage.Well just figure the tank holds 19 gallons. If your gauge says 3/4 full then you have 14.25 gallons, half a tank around 9.5 gallons, etc. You can get a good estimate this way. And this has been brought up before and I think the magical number was 5 gallons of e85 in a full tank; 14 gallons 91 or 93 - makes a full tank.
I suppose you could use Torque Pro or Forscan Lite for that