MyEtho
Ethanol blend calculator & sensor monitor
Calculate fuel blends and — with a flex fuel sensor over Bluetooth — read live ethanol content straight from your tank.
The idea
Numbers, not guesswork.
Running ethanol blends means guessing what’s actually in your tank — pump-gas ethanol content varies by market and season, and mixing by eye compounds the error. MyEtho solves both halves.
The calculators work standalone: enter your tank state and target, and it tells you exactly how much pump gas and ethanol to add — including a fill mode that reaches a target blend on a full tank. Pair a Continental flex fuel sensor over BLE and it adds live ethanol percentage and fuel temperature, logged with a chart and CSV export.
Features
What it does
- Calculate the resulting blend from any two fuel volumes
- Solve for exact gas + ethanol amounts to hit a target blend
- Fill a tank to capacity at a target blend in one formula
- Stream live ethanol % and fuel temperature over BLE
- Log readings with a 10-minute chart and CSV export
- Calibrate pump gas and additive grades for your local market
Screens
On screen
Live dashboard · Mix / Fill calculator · Log & chart
Under the hood