The 2020 BMW i3s gets 113 MPGe combined, making it an efficient car, but understanding that number requires understanding the i3s itself. This isn’t a long-range grand tourer; it’s a city-focused EV designed for nimble commuting and easy errands. Its blend of quirky styling, recycled materials, and instant electric torque appeals to a specific buyer: one who prioritizes sustainability and urban maneuverability over range and traditional luxury.

City and highway performance

The EPA numbers show the i3s’ sweet spot. The 124 MPGe city rating demonstrates its proficiency in stop-and-go traffic, where regenerative braking captures energy that would otherwise be lost. Its 102 MPGe highway rating reflects the inherent limitations of EVs at higher speeds. Aerodynamic drag becomes a significant factor, and the i3s, with its upright stance and relatively small battery, sees its efficiency decline more noticeably than some of its longer-range counterparts. The highway number isn’t *bad*, but it reinforces the i3s’ identity as a vehicle for city driving.

Annual fuel cost

The EPA estimates the 2020 BMW i3s’ annual fuel cost at only $650. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, using the national average electricity price at the time of calculation. Of course, your actual cost will vary depending on your electricity rates, driving habits, and the percentage of time you charge at home versus public charging stations. However, the $650 figure provides a useful benchmark for comparing the i3s’ running costs against those of gasoline-powered vehicles.

Real-world expectations

While the EPA estimates provide a solid foundation, real-world MPGe can change. Hard acceleration, frequent use of climate control, and carrying heavy loads all impact efficiency. I3s drivers often exceed the EPA estimates, especially in cities. The regenerative braking system is highly effective, and the car’s light weight helps overall efficiency.

How it compares

Compared to other EVs in its class, the i3s is competitive. A 2020 Nissan LEAF S, for example, achieves 123 MPGe city and 99 MPGe highway. The Chevrolet Bolt, another popular EV, is rated at 127 MPGe city and 108 MPGe highway. While these vehicles offer similar efficiency numbers, the i3s distinguishes itself with its unique carbon fiber reinforced plastic (CFRP) construction and rear-wheel-drive configuration, offering a different driving experience. The i3s’ design and materials are a conscious choice aimed at reducing its environmental impact, which its target customer values. You can find I3S MPG across all years on our site.

Tips to maximize efficiency

Use regenerative braking. The i3s offers a “one-pedal driving” mode where lifting off the accelerator slows the car and recuperates energy. Mastering this technique can significantly boost your MPGe, especially in stop-and-go city driving.

Precondition the cabin while plugged in. Heating and cooling the car while it’s connected to the charger draws power from the grid rather than the battery, preserving your range. The BMW Connected app makes this feature easy to use remotely.

Keep highway speeds down. EVs are most efficient at lower speeds. Reducing your cruising speed on the highway, even by a few miles per hour, can make a noticeable difference in your remaining range.

Check your tire pressure. Properly inflated tires reduce rolling resistance, improving efficiency. Check your tire pressure regularly and ensure it matches the recommended levels listed on the door jamb.

Consider using “Eco Pro” mode. This mode modifies the throttle response and climate control settings to improve efficiency. While it might slightly reduce performance, it can extend your range, particularly on longer journeys. You can compare the efficiency to all Bmw fuel economy data to see others on the market.