Navigating from point A to point B with Google Maps has historically focused purely on calculating the fastest route by minutes. However, as fuel prices fluctuate and drivers seek to reduce carbon emissions and preserve electric vehicle battery range, travel efficiency encompasses more than speed alone. Google Maps includes a comprehensive Fuel-Efficient Routing feature (designated with a green leaf badge) that calculates routes optimised for lower fuel and energy consumption based on road elevation, traffic congestion, and your specific vehicle powertrain type.
How Fuel-Efficient Routing Works in Google Maps
Google Maps leverages artificial intelligence models trained on data from the US Department of Energy’s National Renewable Energy Laboratory (NREL) and the European Environment Agency. Instead of evaluating distance and speed limits alone, the algorithm analyses real-world variables including:
- Elevation and Road Incline: Steeper gradients consume significantly more petrol and battery charge compared to flatter detours.
- Traffic Flow and Stop-and-Go Congestion: Repeated braking and idling in bumper-to-bumper traffic severely degrades fuel economy.
- Road Types and Speed Consistency: Driving at steady motorway cruising speeds versus navigating stoplights and roundabouts.
- Powertrain Profiles: Hybrid vehicles excel at capturing energy in city stop-and-go traffic via regenerative braking, whereas diesel and petrol engines are generally most efficient at steady motorway speeds.
When the most fuel-efficient route has an estimated arrival time identical or nearly identical to the fastest route, Google Maps automatically defaults to the eco-friendly path.
How to Choose Your Vehicle Engine Type in Google Maps
To ensure Google Maps calculates the most accurate fuel or energy projections, you must designate your car’s engine type within the application settings:
- Open the Google Maps app on your Android or iPhone device.
- Tap your profile picture or initial icon in the top-right corner of the search bar.
- Select Settings from the menu.
- Scroll down and tap Navigation settings.
- Locate the section titled Route options.
- Tap Engine type.
- Choose your vehicle’s specific powertrain:
- Petrol (Gasoline): Standard petrol-driven internal combustion vehicles.
- Diesel: Diesel-powered cars, commercial vans, and trucks that operate most efficiently on uninterrupted highway corridors.
- Hybrid: Vehicles combining petrol engines with regenerative electric motor batteries.
- Electric (EV): Full battery electric vehicles where regenerative braking and lower aerodynamic drag at moderate speeds maximise range.
How to Enable Eco-Friendly Routing
Once your engine profile is set, ensure the eco-friendly routing engine is active:
- Inside Navigation settings, verify that the toggle labelled Prefer fuel-efficient routes is switched to On.
- When enabled, Google Maps will present the eco-friendly alternative prominently alongside conventional route choices whenever navigation is initiated.
Interpreting Route Comparisons and Fuel Savings
When you enter a destination and search for driving directions, Google Maps presents alternative routes marked on the overview map:
- Green Leaf Icon: The route bearing the small green leaf badge represents the most fuel-efficient path for your engine profile.
- Fuel and Energy Savings Metric: Tapping on the eco-friendly route card displays the estimated fuel or kilowatt savings percentage (for instance, “8% fuel savings compared to fastest route”).
- Time Trade-Off Display: Google Maps explicitly lists the time difference—often showing that the eco-friendly route requires only two or three additional minutes while saving substantial fuel and reducing vehicle wear.
You always maintain the freedom to tap the blue fastest route button if time is of the essence, or tap the green leaf route to prioritise economy.
Frequently Asked Questions
Does choosing an electric engine type affect charging station suggestions?
Yes. When you configure your vehicle engine profile as Electric, Google Maps prioritises EV charging stations and displays compatible plug types (such as CCS, CHAdeMO, or NACS) in map searches and along active road trip routes.
Can I turn off fuel-efficient routing completely?
Yes. If you always want Google Maps to select the fastest possible route regardless of fuel consumption, toggle off Prefer fuel-efficient routes under Navigation settings.
Is fuel-efficient routing available on the desktop web version of Google Maps?
Yes, the green leaf eco-friendly route badge appears in desktop browser driving directions in supported countries, though engine type customisation is managed primarily through mobile device accounts.