21 MPG combined is the cold, hard reality for the 2024 Subaru WRX equipped with the automatic (AV-S8) transmission. Let’s be blunt: nobody buys a WRX for stellar fuel efficiency. They buy it for rally-bred performance, turbocharged thrills, and Subaru’s legendary symmetrical all-wheel drive. The fuel economy is simply the price to pay.

City and highway performance

The EPA estimates the WRX will achieve 18 MPG in the city and 25 MPG on the highway. These figures reflect the engine’s characteristics and the realities of driving styles that align with this car’s purpose. City driving, with its constant stop-and-go traffic and frequent acceleration, punishes turbocharged engines like the WRX’s 2.4L boxer four. On the open road, maintaining a steady cruising speed can yield closer to the EPA estimate, but even here, the temptation to use the turbo’s power will inevitably dip into your fuel reserves. Remember, you’re paying for performance, and performance demands fuel.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2024 Subaru WRX is $2,750. This figure is based on driving 15,000 miles per year and using national average fuel prices. It’s a metric to consider, but keep in mind that fuel prices fluctuate, and your actual mileage may vary based on your driving habits and location. If you live in an area with higher fuel costs, or if you use the WRX’s performance potential more often than not, expect to spend considerably more at the pump. The $2,750 figure provides a baseline, not a guarantee.

Real-world expectations

Forget the EPA numbers, what can you *really* expect? If you drive the WRX like a responsible citizen, short-shifting and avoiding boost, you *might* approach the EPA estimates. More realistically, expect to see numbers consistently below 21 MPG. Enthusiastic driving, frequent trips to redline, and the draw of the turbocharger will likely result in averages closer to 18-19 MPG in mixed driving, perhaps even lower in predominantly city conditions. The WRX rewards aggressive driving, but it does so at a cost.

How it compares

The WRX’s fuel economy places it squarely in the middle of its performance-oriented competition. The Volkswagen GTI, for example, achieves a combined 27 MPG with its standard manual transmission. The automatic version still manages 26 MPG combined, a significant advantage. A Honda Civic Si boasts an even higher 31 MPG combined. Even the Hyundai Elantra N, another performance-focused compact, manages 25 MPG combined. However, none of these offer the standard all-wheel drive that is a defining feature of the WRX and a major reason for its lower fuel economy. Scrutinize all all Subaru fuel economy data, as well as competitor fuel efficiency figures. These comparisons matter because the WRX buyer is often cross-shopping these vehicles, weighing performance against practicality. For example, some buyers may also consider a Subaru BRZ, another sporty Subaru. You can review the WRX MPG across all years to see trends.

Tips to maximize efficiency

Resist the urge to bury the accelerator. The WRX’s turbocharged engine is highly responsive to throttle input. Gentle acceleration and anticipating traffic flow can significantly improve fuel economy. Every time you hear the turbo spool up, feel a bit of your wallet disappearing at the same time.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly, especially during temperature changes. The recommended pressure is listed on a sticker inside the driver’s side doorjamb.

Avoid excessive idling. Letting the WRX idle for extended periods, especially in cold weather, wastes fuel. If you’re going to be stopped for more than a minute or two, turn off the engine. Modern engine technology makes restarting easy and efficient.

Use cruise control on the highway. Maintaining a consistent speed can improve fuel economy, especially on long drives. However, be mindful of terrain changes and avoid using cruise control in hilly areas, as the transmission may downshift frequently, negating any potential fuel savings.

Consider using premium fuel. While the WRX doesn’t *require* premium fuel, some owners report slightly better fuel economy and performance when using it. Experiment and see if it makes a difference for your driving style and conditions. If the improvement is marginal, stick with regular unleaded.