The 2018 BMW i3 (94Ah) boasts 118 MPG combined. This number is an MPGe figure, miles per gallon equivalent, which is used for electric vehicles. This i3, specifically the 94Ah version, is about maximizing the efficiency of electrons. The i3 is aimed at urban drivers who want nimble handling, a small footprint, and who are committed to reducing their use of gas. For these drivers, the i3’s quirky styling and limited range are acceptable trade-offs for its quiet operation and green credentials.

City and highway performance

The EPA ratings of 129 MPGe in the city and 106 MPGe on the highway showcase the i3’s strengths. Stop-and-go traffic around town actually improves its efficiency thanks to regenerative braking. This system captures energy during deceleration and sends it back to the battery. Highway driving, while still efficient compared to gasoline cars, puts a greater demand on the battery, resulting in a lower MPGe rating. The i3’s lightweight carbon fiber reinforced plastic (CFRP) construction helps to overcome the energy demands of higher speeds.

The relatively low highway rating is something potential buyers must carefully consider if frequent long-distance travel is part of their routine. If that’s the case, the Range Extender model, which adds a small gasoline engine to maintain battery charge, could be a better option.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 BMW i3 (94Ah) is $650. This figure is based on driving 15,000 miles per year and using the national average electricity prices at the time of calculation. Your actual electricity costs may vary depending on your location, electricity provider, and charging habits. Charging during off-peak hours, when electricity rates are lower, can significantly reduce your annual expenditure. The EPA figure provides a useful benchmark, but i3 owners can often drive their electricity costs down even further.

Real-world expectations

The EPA provides a standardized testing procedure, but real-world MPGe will vary based on driving style, weather conditions, and use of features like air conditioning and heat. Aggressive acceleration and prolonged high-speed driving can quickly deplete the battery, reducing the overall range and MPGe. Smooth acceleration, gentle braking, and preconditioning the cabin while plugged in can help to maximize efficiency. Many i3 owners find they can exceed the EPA’s estimates with careful driving and strategic charging habits. For those interested in I3 MPG across all years, there is readily available data.

How it compares

The i3 is unique in the EV market. Comparing it to other electric vehicles highlights its strengths and weaknesses. The 2018 Nissan LEAF achieves 112 MPGe combined, while the 2018 Chevrolet Bolt boasts 119 MPGe combined. These numbers appear similar to the I3, but the Leaf and Bolt are larger, more conventional hatchbacks targeting a broader audience. The Fiat 500e, another small electric car, achieves 112 MPGe combined. The key difference lies in the i3’s premium feel, innovative use of lightweight materials, and distinctive design. While other EVs might offer slightly better range or a lower price point, the i3 appeals to buyers who value BMW’s engineering and a forward-thinking approach to urban mobility. You can find all Bmw fuel economy data on this hub.

Tips to maximize efficiency

Preconditioning is helpful. Use the i3’s app or in-car controls to pre-heat or pre-cool the cabin while the car is plugged in. This draws power from the grid instead of the battery, which maximizes range, especially in extreme temperatures, and ensures you start your journey in comfort.

Use regenerative braking. The i3 has aggressive regenerative braking when the accelerator is released. Mastering “one-pedal driving,” where you primarily use the accelerator to control both acceleration and deceleration, can increase the amount of energy recaptured and fed back into the battery.

Optimize tire pressure. Make sure your tires are properly inflated to the pressure specified on the doorjamb sticker. Underinflated tires increase rolling resistance, which can reduce range and efficiency. Check your tire pressure regularly, especially during temperature changes.

Be mindful of driving mode. The i3 offers different driving modes, including Comfort, Eco Pro, and Eco Pro+. Experiment with these modes to find the balance between performance and efficiency that suits your driving style. Eco Pro and Eco Pro+ modes limit top speed and reduce the power consumption of accessories like climate control to extend range.