16 MPG combined. The 2023 Porsche 718 GT4 RS isn’t about sipping fuel. It’s about shattering lap records, experiencing raw, unfiltered performance, and connecting with the road on a visceral level. Fuel economy is a secondary consideration for the enthusiast who prioritizes apex speeds over trips to the gas station.

City and highway performance

The EPA estimates of 15 MPG in the city and 19 MPG on the highway reflect the GT4 RS’s single-minded purpose. The naturally aspirated 4.0-liter flat-six engine, derived from the 911 GT3, is tuned for peak power delivery at high RPMs. This is not an engine that thrives on low-speed cruising. It begs to be unleashed, and that means fuel consumption will inevitably suffer. The seven-speed PDK transmission, while incredibly responsive, is also geared for rapid acceleration and track performance, further contributing to the less-than-stellar MPG figures.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2023 Porsche 718 GT4 RS is $3,600. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using the national average fuel price. Considering the premium fuel required for the GT4 RS and the likelihood of spirited driving, this number is likely to be a floor, not a ceiling, for most owners. However, someone who purchases this vehicle is probably less worried about the $3,600 annual estimate and more focused on owning a phenomenal performance machine. You can find all Porsche fuel economy data at FuelEconomyHub.com.

Real-world expectations

Forget hypermiling. The 718 GT4 RS encourages you to explore its limits, to chase the redline, and to relish the symphony of the engine. Real-world fuel economy will vary dramatically depending on driving style and conditions. Track days, canyon runs, and aggressive acceleration will invariably result in numbers below the EPA estimates. More relaxed highway cruising might yield closer to 19 MPG, but how often will that be the case? Owners who track their GT4 RS frequently will likely see a far higher annual fuel expenditure than the EPA’s estimate, but that is a trade-off they will accept without hesitation.

How it compares

The Porsche 718 GT4 RS isn’t cross-shopped against efficient hybrids. Buyers are typically considering other high-performance coupes. A similarly focused track weapon like the Chevrolet Corvette Z06 (with the naturally aspirated 5.5L V8), delivers a slightly better 15 MPG city and 21 MPG highway. The BMW M4 Competition xDrive manages 16 MPG city and 23 MPG highway, while offering all-wheel drive grip. These differences, while notable on paper, are largely irrelevant to the typical GT4 RS buyer. They prioritize the unique character, precision, and overall driving experience that the GT4 RS delivers, regardless of a few MPG. You can research 718 MPG across all years at FuelEconomyHub.com.

Tips to maximize efficiency

While fuel economy might not be a primary concern, drivers can still adopt strategies to improve gas mileage. The most effective method is simply to drive conservatively. Avoid aggressive acceleration and braking, and maintain a steady speed on the highway. The GT4 RS features a Sport mode and a Track mode. Both modes optimize the engine and transmission for performance instead of efficiency, so keeping the car in “Normal” mode when possible will help conserve fuel.

Ensure that the tires are properly inflated. Underinflated tires increase rolling resistance, leading to lower fuel economy. Check the tire pressure regularly and inflate them to the recommended level, which can be found on the driver’s side doorjamb.

Reduce unnecessary weight. Removing any non-essential items from the car, such as track equipment or bulky cargo, can slightly improve fuel economy. Every pound counts, and the GT4 RS is already a relatively lightweight machine, so minimizing added weight can contribute to better efficiency.

Plan your routes strategically. Avoiding stop-and-go traffic and congested areas can significantly improve fuel economy, especially in the city. Using navigation apps to find the most efficient routes can help minimize fuel consumption.