EngineMilesA plug-in hybrid can travel using stored electricity, gasoline, or both. The odometer counts all that distance together. EngineMiles adds a separate estimate based on the fuel you record.
The simple calculation
Fuel used × gas-only fuel economy ≈ engine miles
For example, 8.426 gallons × 38 miles per gallon gives approximately 320 engine miles. These are example inputs, not a recommended MPG for every vehicle.
For metric entries, the same idea uses fuel in liters and consumption in liters per 100 kilometers: fuel ÷ consumption × 100 gives estimated engine kilometers.
Start from a full tank
A full tank provides a useful starting boundary for your log. The first full tank establishes the baseline; later fill-ups add to the fuel-based estimate. A starting engine-mile total, if you enter one, carries forward in the app.
Your total odometer reading and your logged engine-mile estimate may cover different periods. Don’t subtract a partial fuel history from the lifetime odometer to work out lifetime electric mileage.
Where the uncertainty comes from
Fuel economy changes with weather, speed, traffic, terrain, driving habits, and other conditions. An engine can also burn fuel while idling or charging the battery. Fuel-based engine miles are an estimate, rather than a direct measurement of engine runtime or exact engine-driven distance.
What about electric miles?
For PHEVs, Pro compares logged driving distance and estimated engine miles to show an estimated gas-versus-electric split over the tracked history. Regular hybrids do not show an electric split.
What can I use it for?
Keep a consistent record of fill-ups, understand patterns in your driving, and follow a chosen oil-change goal. Follow your vehicle manufacturer’s maintenance schedule; an estimate should not replace its mileage or time-based recommendations.
Next: choose your gas-only fuel economy or get EngineMiles for iPhone.