SETUP
Restored your last setup.
YOUR TANK
THE PUMPS
“E85” at the pump legally ranges E51–E83 by season. Test it if you can.
TARGET
READ FROM CAR fills tank mix & fuel level from the ECU
Ignition on. Bluetooth LE adapters connect straight from this page with READ FROM CAR. Classic-Bluetooth adapters like the OBDLink MX+ pair with your computer first, then use PAIRED / SERIAL ADAPTER (desktop only). Ethanol readout needs a flex-fuel car. No adapter? Grab a Bluetooth LE OBD-II adapter on Amazon.
TEST YOUR FUEL tube-tester helper
Fill the tube with water to a line, top up with fuel, cap and shake, then let it settle. Ethanol bonds to the water and raises the separation line. Enter the three readings and skip the printed scale.
Approximate: it ignores the small volume shrink when water and ethanol mix, same as most testers' printed scales.
No tester yet? Grab a tube tester on Amazon. A few bucks, lives in the glovebox.
THE MIX
After the fill: 16.0 gal in the tank at E30. Estimates only. Always verify your fuel system, tune, and ethanol content before running high blends.
CAN IT RUN E85?
Factory flex-fuel lookup, engine by engine, live from EPA fuel-economy data covering every US-market vehicle since 1984.