This application has been built for users owning Mazda MPS / Mazdaspeed / CX-7 (petrol) vehicles which can run ethanol mixed with unleaded fuel.This application can calculate the amount of fuel to feed in tank to reach a programmed Ethanol content mix.The application has been created in English (GB and US) and is also translated (by the moment) in French (FR and CA) as MPS is used for Europe and Mazdaspeed is used for Americas.You can set Gas and Ethanol aliases in the settings menu. At the first launch, the application asks for your vehicle type (Mazda 3 gen1 or gen2, Mazda 6 or Mazda CX7), the distance measure unit (Kilometers or Miles) Then will ask you for cold and hot date ranges (as ethanol content is variable between these date ranges) with four sliders.After that, the application is configured with default Ethanol mixture values per fuel type (Ethanol content = 85% and Gas content = 5%)You can set a "per season" Gas and Ethanol percent content in the settings menu (this will help the application to calculate the exact amount of fuel to fill by season)You can set your current percentage of Ethanol mixture and your desired (target) ethanol mixture.You can fill up the tank or simply add a desired amount of Liters / GallonsAfter filling the tank, the application will automatically set the current ethanol mixture with the same setting in target ethanol mixture.The application can calculate the average fuel consumption on each fuel fill (as it can track your odometer) The application can track your amount of fuel filled and automatically adjust the current mix gauge if you do not fill exactly what the applications fuel told you to fill (i.e. You told the app that your tank had fifteen liters, but it has fourteen liters and you feed one more liter of Ethanol inside) You can export to cloud your applications configuration and your fuel filled data (CSV format) and restore it if you format your device and reinstall the application.You can control your HPFP servicing cycles depending on ethanol mix and distance (to avoid engine damage)You will be warned if you didnt do the HPFP servicing until you do it!