20 MPG combined won’t win any eco awards, and the Porsche 911 Carrera 4S isn’t trying to. This is a high-performance sports car, not a hybrid commuter. The reality is that people who buy a 911 4S prioritize driving experience, acceleration, and the visceral thrill of a finely tuned machine far more than fuel efficiency.

City and highway performance

The EPA estimates for the 2024 Porsche 911 Carrera 4S 3.0L place it at 18 MPG in the city and 23 MPG on the highway. Let’s be honest: the city number is likely optimistic for anyone who enjoys frequent bursts of acceleration away from stoplights. The highway figure is more attainable, but still dependent on a light foot and consistent speeds. The eight-speed automatic transmission (AM-S8) certainly helps on the open road, keeping the engine in its sweet spot for both power and relative efficiency. However, unleash the turbos and expect that number to drop, regardless of where you’re driving.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2024 Porsche 911 Carrera 4S will be $2,900. This figure is based on driving 15,000 miles per year and using national average fuel prices. Of course, your actual fuel costs will vary depending on your driving habits, location, and the prevailing price of premium gasoline, which this car requires. Consider the $2,900 a baseline, spirited driving and heavy traffic can easily push that number higher. If you’re truly concerned about fuel costs, you’re looking at the wrong car. Those buying a 911 generally accept this expense as simply part of the ownership experience.

Real-world expectations

While the EPA numbers provide a baseline, real-world fuel economy with the 911 4S is highly dependent on driver behavior. Those who predominantly use the car for weekend fun runs, track days, and the occasional head-turning sprint may see numbers closer to the city estimate, or even lower. Owners who use it for longer commutes, with a mix of city and highway driving, and who are disciplined with the throttle, might achieve figures closer to the combined EPA rating, and possibly even slightly higher on longer highway trips. The key is moderation and resisting the urge to constantly explore the upper reaches of the tachometer. Remember too that the 4S’s all-wheel-drive system adds a bit of weight and complexity, impacting fuel economy slightly compared to a rear-wheel-drive 911 Carrera.

How it compares

Compared to other sports cars in its class, the 911 Carrera 4S offers fuel economy that is in line with expectations. For instance, the BMW M4 Competition, with its 3.0L twin-turbo inline-six, manages around 16 MPG in the city and 23 MPG on the highway. The Chevrolet Corvette Stingray, while boasting a naturally aspirated 6.2L V8, gets comparably close with about 16 MPG city and 24 MPG highway. Even the Porsche 718 Cayman GTS 4.0, with its smaller displacement naturally aspirated flat-six, lands around 19 MPG combined. These figures demonstrate that the 911’s 20 MPG is typical when selecting a high-performance vehicle, and further underscores why potential buyers are primarily motivated by other qualities. You can compare 911 MPG across all years to see trends in fuel economy.

Tips to maximize efficiency

Resist the urge to constantly use launch control. It’s addictive, yes, but every full-throttle blast contributes significantly towards lowering your MPG. Save it for special occasions and enjoy the car’s inherent responsiveness at lower speeds.

Use the Normal driving mode when cruising. The 911 offers various driving modes that dramatically alter the car’s performance. Normal mode softens throttle response and optimizes the transmission for efficiency without completely neutering the driving experience.

Keep your tires properly inflated. The 911’s performance is highly dependent on having correctly inflated tires, and under-inflation increases rolling resistance, which, in turn, reduces fuel economy. Check your tire pressures regularly.

Avoid unnecessary idling. If you’re stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and reliably, and idling consumes fuel without any benefit.

Consider your route. Aggressive city driving with constant stop-and-go traffic will plummet your MPG compared to a steady highway cruise. Plan routes that minimize congestion and maximize smooth, consistent speeds when possible. If you are curious about the fuel economies of other vehicles offered by the manufacturer, you can find all Porsche fuel economy data on this site.