28 MPG combined from a 1.5L 3-cylinder engine in the 2016 BMW i8 might seem unremarkable. But judging this plug-in hybrid supercar solely on its gasoline consumption misses the point. It’s not a Prius competitor, it’s a head-turning, carbon-fiber-bodied performance machine that sips fuel like a much smaller car. I8 buyers prioritize design, technology, and presence over ultimate efficiency, and the fact that it achieves nearly 30 MPG while delivering supercar thrills is a huge win.

City and highway performance

The EPA rates the 2016 BMW i8 at 28 MPG in the city and 29 MPG on the highway. These figures are surprisingly consistent, reflecting the complex hybrid system’s ability to blend electric and gasoline power across driving conditions. The electric motor provides instant torque for quick acceleration, reducing how much the gasoline engine is used. On the open road, the i8’s aerodynamic design and efficient powertrain provide respectable fuel economy for a performance car. These official figures represent a good baseline, but mileage will vary based on driving style and charging habits, as with any hybrid.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 BMW i8 at $2,050. This is based on driving 15,000 miles per year and using national average fuel prices. The actual cost may change depending on local fuel prices and individual driving. Keep in mind that this calculation does not include the cost of electricity to charge the i8’s battery, which will increase the overall running expenses but also lower gasoline consumption.

Real-world expectations

EPA estimates are a useful reference, but real-world fuel economy often differs. With the i8, the amount of variation depends on how often you charge the battery and how aggressively you drive. If you consistently use the electric range (rated around 15 miles) and drive conservatively, you can exceed the EPA’s combined MPG rating. However, relying on the gasoline engine and accelerating quickly will likely result in lower numbers. Many owners achieve well over 30 MPG in mixed driving, and some report figures closer to 40 MPG with regular charging.

How it compares

The 2016 BMW i8 stands out for its efficiency, compared to other high-performance vehicles. For example, a comparable Porsche 911 achieves around 20-22 MPG combined, less than the i8. Even a sporty sedan like the BMW 340i, known for its efficient performance, only manages around 26 MPG combined. Of course, all Bmw fuel economy data demonstrates wide variation depending on model and specific engine. The Chevrolet Volt offers better fuel economy (around 42 MPG combined) if you include other plug-in hybrids, but it lacks the i8’s style and performance. For buyers considering the I8 MPG across all years, this model stands alone in its class.

Tips to maximize efficiency

Use the i8’s electric driving modes and the electric motor for short trips and city driving to save fuel. Charging the battery often will reduce gasoline use and improve overall MPG.

Smooth acceleration is important for maximizing efficiency. Instead of aggressive starts and hard braking, drive gradually to allow the electric motor to work well. Anticipating traffic flow and maintaining a consistent speed can make a difference.

When slowing down, let the regenerative braking capture energy and recharge the battery. Lift off the accelerator instead of braking hard.

Keep your tires inflated to the correct pressure. Low tire pressure increases rolling resistance, which hurts fuel economy. Regularly check and maintain the recommended pressure for the best performance.

Remove unnecessary items from your trunk or cargo area to reduce weight and improve efficiency. Extra weight increases fuel consumption.