Ethanol Top vs DSFlex ECA

Ethanol Top-Off tells you exactly how much ethanol (or gasoline) to add to your tank to hit the blend percentage you're tuning for. If you run E85, flex-fuel, or mix your own blend for a track car, you already know pump ethanol content varies and doing the math at the gas station gets old fast. Enter your tank size, your best estimate of what's already in there, and your target percentage — Ethanol Top-Off gives you the exact volume to add. - Simple slider-and-stepper inputs, no fiddly keyboards - Instant results as you adjust any value - Works both directions — blend up or dilute down - No account, no ads, no internet connection needed - Nothing you type ever leaves your phone

DSFlex ECA is the official companion app for the DSFlex Ethanol Content Analyzer — a precision Bluetooth sensor that measures the real ethanol content and temperature of the fuel in your tank. Built for flex fuel tunes, E85 conversions, and anyone running a blend of gasoline and ethanol, DSFlex ECA gives you accurate, real-time readings so you can tune with confidence. FEATURES - Live ethanol content (%) and fuel temperature, streamed over Bluetooth from your DSFlex sensor. - Blend Calculator with two modes — Target Mix (hit a specific ethanol blend without topping off) and Fill Tank (top off completely using two fuels). - Customizable units — Fahrenheit or Celsius, liters or gallons. - Set your local pump gas ethanol percentage and default tank size for accurate calculations. - Clean, simple interface built for quick glances while working on your vehicle. DSFlex ECA is a measurement and information tool. It does not tune your engine or control any vehicle system — it gives you the accurate data you need to make your own tuning decisions. Requires a DSFlex Ethanol Content Analyzer sensor (sold separately).