With 28 MPG combined, the 2021 BMW Z4 sDrive30i is a surprisingly efficient sports car, though most buyers prioritize performance. This two-seat roadster focuses on driving pleasure, and the readily available power from its turbocharged four-cylinder engine encourages enthusiastic driving, which impacts fuel consumption.

City and highway performance

The Z4 sDrive30i delivers an EPA-estimated 25 MPG in the city and 32 MPG on the highway. These figures are respectable for a vehicle of this type and reflect the efficiency of Bmw’s modern engine technology. The eight-speed automatic transmission also plays an important role, optimizing gear selection for both performance and fuel economy. The highway number suggests that the Z4 is a comfortable and relatively efficient long-distance cruiser when driven with a light foot. However, drivers who accelerate quickly will see this number decrease, because the car accelerates eagerly.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,050 for the 2021 Bmw Z4 sDrive30i. This figure is based on 15,000 miles of driving per year, with a mix of city and highway conditions, at the national average fuel prices. Your actual expenses may vary depending on your driving habits, the type of fuel you use, and local fuel costs. Drivers in urban areas with heavy traffic or those who frequently use the engine’s performance potential can expect to exceed the $2,050 estimate. For those interested in viewing all Bmw fuel economy data, further resources are available.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy can vary significantly. The Z4 sDrive30i encourages spirited driving, and maintaining the EPA’s combined rating requires restraint. Drivers who frequently engage “Sport” mode or take advantage of the engine’s ample torque will likely see fuel economy closer to the low 20s. Those who prioritize fuel efficiency and drive more gently can potentially exceed the EPA estimates. It depends on personal driving habits and how you drive.

How it compares

The Z4’s fuel economy is competitive within the sports car segment. The Porsche 718 Boxster, another benchmark roadster, achieves an EPA-rated 24 MPG combined in its base four-cylinder configuration. The Mazda MX-5 Miata, known for its lightweight design and engaging driving dynamics, gets 30 MPG combined. However, the Miata offers significantly less power and a different driving experience. The Audi TT, a similarly styled competitor, offers a combined 26 MPG with its standard engine. The Z4 balances performance and fuel efficiency that appeals to drivers seeking both qualities. Comparing Z4 MPG across all years can offer additional insight. Ultimately, it depends on what’s more important for the buyer.

Tips to maximize efficiency

Use the Z4’s “Comfort” or “Eco Pro” driving modes. These modes adjust engine and transmission settings to prioritize fuel efficiency, reducing throttle response and encouraging earlier upshifts. “Sport” mode offers the most engaging driving experience, but it also consumes significantly more fuel.

Avoid aggressive acceleration and braking. The Z4’s turbocharged engine responds readily to throttle inputs, but excessive acceleration wastes fuel. Smooth and gradual acceleration, along with gentle braking, will help to conserve fuel. Anticipate traffic conditions and maintain a consistent speed whenever possible.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and maintain the recommended pressure listed on the doorjamb placard.

Minimize aerodynamic drag. Remove any unnecessary items from the interior or trunk, as extra weight increases fuel consumption. Avoid using roof racks or carriers unless absolutely necessary, as they can significantly increase drag.

Consider using premium fuel. While the Z4 sDrive30i can run on regular unleaded fuel, using premium fuel can improve performance and fuel economy. The engine is designed to use premium fuel’s higher octane rating, which can result in slightly better mileage, especially during spirited driving.