23 MPG combined won’t set the world on fire, but for the 2020 Ford Mustang Convertible 2.3L EcoBoost, it’s an acceptable compromise. This isn’t a Prius, and it’s not trying to be. Buyers of this Mustang aren’t prioritizing ultimate fuel efficiency; they’re buying wind-in-their-hair thrills, iconic styling, and a potent turbocharged engine that delivers surprising performance, all at a relatively accessible price. The fuel economy is simply the cost of admission.

City and highway performance

The 2.3L EcoBoost Mustang Convertible manages 20 MPG in the city and 28 MPG on the highway. The city number reflects stop-and-go traffic, where the engine’s turbocharger may work harder to provide the necessary boost for quick acceleration from lights. This is especially true with the 10-speed automatic transmission (S10) constantly shifting to keep the engine in its optimal power band. On the open road, the Mustang’s aerodynamics and taller gearing allow the engine to cruise more efficiently, resulting in that higher 28 MPG highway figure. The difference between city and highway highlights the car’s suitability for longer cruises and weekend getaways, rather than solely urban commutes.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Ford Mustang Convertible 2.3L 4-cyl at $1,900. This calculation is based on driving 15,000 miles per year, with a mix of city and highway driving, and using the national average fuel price. Individual spending may vary depending on driving habits, local fuel prices, and the type of fuel used. However, this $1,900 figure provides a useful benchmark for prospective buyers to understand the ongoing running costs associated with owning this vehicle.

Real-world expectations

EPA estimates provide a baseline, but real-world fuel economy will naturally vary depending on individual driving style and conditions. Drivers with a heavier foot, or those who frequently use the engine’s turbocharged power, can expect to see figures closer to the city rating, or even lower.

However, those who prioritize smooth acceleration and consistent speeds on the highway may be able to exceed the EPA’s 28 MPG estimate. Ultimately, the key to achieving the advertised fuel economy lies in responsible driving habits and proper vehicle maintenance.

How it compares

Compared to its rivals, the Mustang Convertible 2.3L’s fuel economy is competitive within its segment. The Chevrolet Camaro Convertible with its base 2.0L turbocharged engine achieves a slightly better 22 MPG city / 31 MPG highway, although the real-world difference may be negligible. The Mazda MX-5 Miata, while not directly comparable in terms of power and size, offers significantly better fuel economy, with ratings of around 26 MPG city / 35 MPG highway in its automatic transmission guise. The Miata caters to a different buyer seeking lightweight agility over outright power.

For those considering a more premium option, the BMW Z4 sDrive30i, also a convertible, achieves around 25 MPG city / 32 MPG highway, but comes with a significantly higher price tag. The MUSTANG MPG across all years can be explored here.

Tips to maximize efficiency

Use smooth and gradual acceleration whenever possible. The 2.3L EcoBoost engine delivers its power smoothly, so there’s no need to stomp on the accelerator to get up to speed. Gentle acceleration will allow the turbocharger to spool up more efficiently, reducing fuel consumption.

Maintain a consistent speed on the highway. Using cruise control on long journeys can help prevent unnecessary speed fluctuations, which can negatively impact fuel economy. Avoiding sudden bursts of acceleration for overtaking will also contribute to better efficiency.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressures regularly and inflate them to the recommended levels, which can be found on a sticker inside the driver’s side doorjamb.

Regularly inspect and replace your air filter. A clogged air filter restricts airflow to the engine, reducing performance and fuel efficiency. Replacing a dirty air filter is a quick and inexpensive way to improve your Mustang’s fuel economy.

Consider using the available drive modes. The Mustang may offer different drive modes that can affect throttle response and shift patterns. Experiment with these modes to find the one that best suits your driving style and prioritizes fuel efficiency when needed. For all Ford fuel economy data, see here.