16 MPG combined: let’s be brutally honest, the fuel economy of the 2024 Porsche 911 GT3 RS is almost entirely irrelevant to its target demographic. This isn’t a car purchased for its responsible consumption; it’s a precision instrument designed for one purpose: annihilating lap times. The minuscule impact on lower fuel costs is the last thing on the mind of someone shelling out well north of $200,000 for a track-honed weapon.

City and highway performance

The EPA estimates that the GT3 RS achieves 14 MPG in the city and 18 MPG on the highway. To put it mildly, these numbers are sobering. The city figure reflects the stop-and-go realities of urban environments, where the car’s aggressive tuning and naturally aspirated engine fight against efficiency. The highway figure, while slightly better, still indicates that sustained high-speed cruising isn’t this car’s forte, or really, its purpose. The seven-speed PDK (Porsche Doppelkupplung) automatic transmission, while incredibly effective on the track for its lightning-fast shifts, isn’t geared towards maximizing fuel efficiency on longer journeys. The reality is most owners will see even lower numbers than this, especially given the temptation to continually explore the upper reaches of the tachometer.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Porsche 911 GT3 RS at $3,600, based on driving 15,000 miles per year and using prevailing national average fuel prices for premium gasoline. This is a considerable expense, and again, highlights that pragmatism isn’t a factor in the buying decision. Someone drawn to the GT3 RS isn’t likely to be deterred by this figure; it’s simply the cost of admission to a very exclusive club. Consider this just another line item in the budget next to track fees and replacement tires.

Real-world expectations

Don’t expect to consistently achieve the EPA estimates. The aggressive aerodynamic package, designed to generate substantial downforce, creates significant drag, impacting fuel consumption at higher speeds. The GT3 RS is designed to be driven hard. Frequent full-throttle acceleration runs, extended track sessions, and enthusiastic mountain road blasts will considerably lower the MPG figures you actually experience. Few owners will be using eco-driving techniques behind the wheel of this car. The nature of the GT3 RS encourages spirited driving, and the fuel consumption will reflect that.

How it compares

Compared to other high-performance vehicles, the GT3 RS’s fuel economy is predictably poor. Consider that a Mercedes-AMG GT Black Series, another track-focused machine with strong performance, manages a combined 17 MPG. A Ferrari SF90 Stradale, despite its hybrid powertrain adding complexity, achieves a comparatively impressive 18 MPG combined due to its electric assistance, and the McLaren 765LT lands very close, at 15 MPG combined. These aren’t direct competitors in terms of pure track prowess, but they exist in the same price bracket and offer similar levels of performance that matter to the same buyer. The slightly better fuel economy found in some similarly potent sports cars is unlikely to sway a dedicated GT3 RS enthusiast. The visceral experience and precision driving dynamics unique to a GT3 RS make it an almost singular choice. You can view all Porsche fuel economy data on our site, or dig specifically into 911 MPG across all years.

Tips to maximize efficiency

While squeezing every last drop of fuel from a GT3 RS seems counterintuitive, there are a few strategies that can, theoretically, improve efficiency without completely neutering the driving experience. Minimize unnecessary idling. The engine consumes fuel even when stationary, so avoid leaving the car running unnecessarily, especially during warm-up.

Maintain optimal tire pressure. Correctly inflated tires reduce rolling resistance, which directly improves fuel efficiency. Refer to the sticker inside the driver’s side door for the recommended tire pressure, and check them regularly. This is important for both efficiency and safety.

Resist the urge to constantly use launch control or perform excessively aggressive accelerations. Smoother, more deliberate driving inputs will translate into slightly better fuel economy, though it will require a great deal of discipline from the driver.

Avoid carrying unnecessary weight. The GT3 RS is engineered for optimal performance with a specific weight distribution in mind. Removing any excess baggage from the car, track day spares excepted, will contribute to marginal efficiency gains.