17 MPG combined is the figure you’d expect and arguably demand from a vehicle like the 2026 Ford Mustang Dark Horse. This isn’t a commuter car; it’s a track-capable, street-legal weapon, a visceral 500-horsepower expression of American muscle. The Dark Horse represents the pinnacle of naturally aspirated Coyote V8 performance in the current Mustang lineup, a machine designed to thrill, not to sip fuel. Its owners prioritize raw power delivery, exhilarating exhaust notes, and precise handling over miserly fuel consumption. They understand that the visceral experience derived from its 5.0L 8-cylinder engine comes with an inherent appetite for premium unleaded, and they wouldn’t have it any other way. This combined figure acknowledges the vehicle’s mission, to deliver unadulterated performance for those who appreciate it most.

City and highway performance

Looking at the EPA estimates, the 14 MPG in city driving for the Dark Horse paints an even clearer picture. Stop-and-go traffic, frequent accelerations, and the sheer inertia of even a performance-tuned pony car with a large displacement V8 are significant contributors to this figure. The 10-speed automatic transmission (S10) is remarkably adept at choosing the right gear for efficiency, but it&#8217s ultimately working with a substantial amount of power on tap. Owners will find that any spirited driving, even within city limits, will quickly push consumption lower than this number. On the highway, the Dark Horse achieves 22 MPG because of modern engine management and the well-geared 10-speed automatic. Cruising at consistent speeds allows the Coyote V8 to settle into its most efficient operating RPMs, transforming it from a roaring beast to a surprisingly capable grand tourer. While 22 MPG isn&#8217t class-leading for long-distance cruising, it&#8217s a perfectly acceptable figure for a vehicle that can embarrass many sports cars on a track or drag strip.

Annual fuel cost

The EPA provides an annual fuel cost estimate of exactly $2,600 for the 2026 Ford Mustang Dark Horse. This figure is calculated based on an assumed 15,000 miles driven per year, split evenly between city and highway conditions, and using national average fuel prices. For many Dark Horse owners, this cost will likely be higher. The very nature of this vehicle encourages more spirited driving, more track days, and more spontaneous weekend blasts, all of which consume fuel at a faster rate than the EPA&#8217s standardized test cycles. The Dark Horse unequivocally demands premium fuel, which typically carries a higher price per gallon than regular unleaded. Prospective buyers should factor this $2,600 baseline and the likelihood of exceeding it into their budget alongside insurance, maintenance, and tire costs. It&#8217s a performance car, and its running costs reflect that.

Real-world expectations

In the real world, the fuel economy of the Mustang Dark Horse will vary wildly depending on the driver and driving style. If you’re purchasing this vehicle purely for its aesthetic and the prestige of owning the meanest naturally aspirated Mustang, and you drive it like a commuter car, you might consistently see figures close to the EPA estimates. However, the Dark Horse isn&#8217t designed for such restraint. Its powertrain begs to be explored, its exhaust note demands to be heard, and its handling capabilities invite spirited drives. Owners who frequent track days or enjoy engaging in enthusiastic acceleration runs will invariably see their MPG drop significantly into the low double digits, and perhaps even single digits during prolonged track sessions. The satisfaction derived from unleashing 500 horsepower, though, is generally considered by its buyers to be well worth the increased fuel consumption. The buyers of the Dark Horse aren&#8217t looking for excuses, they&#8217re looking for performance, and they accept the associated trade-offs. You can find more MUSTANG MPG across all years on our site.

How it compares

Comparing the Dark Horse’s fuel economy to its direct performance rivals highlights its positioning. A primary competitor, the Chevrolet Camaro ZL1 1LE (which, regrettably, is seeing its final model year this generation), equipped with its supercharged 6.2L V8 and manual transmission, typically returns lower figures, often in the 13 MPG combined range (12 city/16 highway). This is primarily due to the forced induction and often larger displacement. Another competitor, though slightly different in ethos, might be certain trims of the Porsche 911 Carrera. A 992-generation Carrera S with its 3.0L twin-turbo flat-six and PDK transmission, for example, typically achieves around 20-21 MPG combined (18 city/24 highway), showcasing the efficiency advantages of forced induction and smaller displacement, albeit at a significantly higher price point. The Dark Horse also finds itself competing with vehicles like the Toyota Supra 3.0, whose BMW-sourced 3.0L inline-six (B58) consistently delivers around 26 MPG combined (23 city/31 highway), a stark contrast, but also a completely different powertrain character. These comparisons put the Dark Horse’s 17 MPG combined figure squarely in the pocket of high-performance, naturally aspirated V8 muscle cars. It’s an unapologetic V8, and its MPG reflects that commitment.

Tips to maximize efficiency

While the Dark Horse is built for performance, there are still ways to optimize its fuel consumption for those moments you’re not actively carving canyons or hitting apexes. Maintaining smooth, progressive throttle inputs is crucial. Avoid sharp, sudden accelerations and decelerations, allowing the 10-speed automatic to shift efficiently and the engine to operate within its more economical RPM range.

Adhering to posted speed limits on the highway contributes significantly to better fuel economy. Aerodynamic drag increases exponentially with speed, and for a relatively blunt instrument like a Mustang, this effect is pronounced. Keeping a steady pace allows the Coyote V8 to cruise efficiently.

Regular maintenance is essential for optimal engine performance and efficiency. Ensure your Dark Horse receives its scheduled oil changes, air filter replacements, and other services. A well-maintained engine runs more smoothly and uses fuel more effectively.

Monitor your tire pressure religiously. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Properly inflated tires improve not only efficiency but also handling and safety. You can find all Ford fuel economy data here.

Consider using the available drive modes. While the Dark Horse offers performance-focused modes, selecting a more docile setting for everyday commuting or cruising can smooth out throttle response and encourage more economical driving patterns, helping to nudge that MPG figure upward.