The 2018 Nissan 370Z Roadster’s 21 MPG combined fuel economy won’t turn heads, but that figure is secondary for a car so focused on driving pleasure. This convertible sports car exists for the thrill of the road. Fuel economy is less important than the V6 engine’s sound and the open-air experience.

City and highway performance

EPA estimates for the 2018 370Z Roadster are 18 MPG in the city and 25 MPG on the highway. These figures, achieved with the 7-speed automatic transmission, are due to the engine tuning and short gearing. In the city, the engine’s responsiveness can lead to frequent fuel consumption. The highway MPG is better, but the car’s sporty feel still encourages drivers to explore the higher RPMs, affecting gas mileage. The six-speed manual offers similar fuel economy.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Nissan 370Z Roadster at $2,750. This is based on 15,000 miles per year and national average premium gasoline prices, which this engine needs. Expect higher costs for those driving more or living in areas with higher gas prices.

Real-world expectations

EPA estimates provide a standard, but real-world MPG in the 370Z Roadster depends on driving style. Drivers who accelerate gently and maintain consistent speeds can likely get close to EPA numbers. However, the car encourages drivers to enjoy its performance. Expect lower MPG if you drive aggressively or spend time in stop-and-go traffic. The engine encourages aggressive driving to fully enjoy the driving feel, so most drivers don’t buy this car for its efficiency, even though achieving the window sticker’s fuel rating is possible.

How it compares

The 370Z’s fuel economy falls in the middle compared to other sports cars. The Mazda MX-5 Miata, gets about 30 MPG combined. However, the Miata focuses on lightness and agility rather than power. The BMW Z4, with its turbocharged engines, gets similar or slightly better fuel economy, depending on the engine and year, while providing a more premium experience for a higher price. The now discontinued Pontiac Solstice GXP/Saturn Sky Redline turbo models also provided better gas mileage, with similar performance. Buyers choose the 370Z Roadster trading some fuel efficiency for its V6 engine’s raw power, someone focused on MPG would consider other vehicles.

Tips to maximize efficiency

Getting the most from the 370Z’s fuel takes effort. Avoid aggressive acceleration, and instead, gently press the accelerator. Smooth inputs will reduce fuel consumption, especially in cities.

Regularly check your tire pressure, and keep tires inflated to the recommended level. Underinflated tires increase rolling resistance and require the engine to work harder and burn more fuel. Checking tire pressure before driving can improve MPG across all model years.

Avoid idling. If stationary for more than a minute or two, turn off the engine. Modern engines restart quickly, saving fuel. It also reduces engine wear.

Always use premium fuel as specified by Nissan. The 3.7L V6 requires high-octane gasoline for optimal performance and fuel economy. Using lower-grade fuel can hurt both. Check Nissan fuel economy data to confirm what fuel type is necessary.

Finally, have the car professionally tuned. A tune can adjust the engine’s air-fuel ratio and ignition timing for better efficiency without reducing performance. While an investment, it can help save you some money.