19 MPG combined. That’s the EPA’s official fuel economy estimate for the 2015 Porsche Panamera GTS with its naturally aspirated 4.8-liter V8. It’s a number that might make a Prius owner faint, but for the buyer considering a high-performance luxury sedan that can genuinely embarrass sports cars on a twisty road, it’s simply the cost of doing business. No one buys a Panamera GTS for its fuel efficiency; they buy it for its intoxicating blend of performance, luxury, and Porsche DNA, and accept the less-than-stellar gas mileage as a necessary trade-off.

City and highway performance

The EPA breaks down the Panamera GTS’s fuel economy further, estimating 16 MPG in the city and 24 MPG on the highway. The city figure reflects the engine’s thirst when constantly accelerating and decelerating in stop-and-go traffic, conditions where the V8 is least efficient. The highway figure, while still not stellar, shows that the Panamera GTS can achieve relatively reasonable mileage when cruising at a steady speed. Even on the open road, aggressive acceleration and high speeds will quickly diminish that 24 MPG figure.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2015 Porsche Panamera GTS is $3,050. This figure is based on driving 15,000 miles per year and using national average fuel prices. Of course, the actual cost will vary depending on individual driving habits and fluctuations in gasoline prices. Someone who primarily drives in the city or has a heavy foot will likely spend significantly more, while someone who mostly cruises on the highway and drives conservatively might spend slightly less. This $3,050 figure gives potential buyers a good idea of the ongoing expense associated with owning and operating this high-performance machine.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy for the Panamera GTS often differs. Drivers who regularly exploit the V8’s performance potential, and let’s be honest, that’s a huge part of the appeal, will likely see numbers closer to the low teens in the city and perhaps the low 20s on the highway. Careful drivers who prioritize fuel efficiency can realistically achieve figures closer to the EPA estimates, especially on longer highway trips. Driving style, traffic conditions, and even tire pressure can all significantly impact fuel consumption.

How it compares

Compared to its peers, the 2015 Panamera GTS’s fuel economy sits in a predictable range. A BMW M5 from the same year, with its turbocharged V8, achieves a similar 17 MPG combined. The Mercedes-AMG E63 S, another V8-powered rival, mirrors that figure, hovering around 16 MPG combined. Even Porsche’s own Cayenne GTS, with the same 4.8L V8, offers only marginally better fuel economy. The Panamera GTS exists within a bracket, and that bracket caters to buyers who prioritize power and prestige over ultimate efficiency. Looking across PANAMERA MPG across all years can provide a broader view of efficiency trends within the model line. Prospective buyers might also want to examine all Porsche fuel economy data for further comparison.

Tips to maximize efficiency

Because the Panamera GTS’s 4.8-liter V8 is a naturally aspirated engine, avoiding aggressive acceleration is critical for maximizing fuel economy. Unlike turbocharged engines, which deliver instant torque, the V8 requires higher RPMs to produce peak power, meaning increased fuel consumption. Smooth and gradual acceleration will significantly reduce fuel usage.

Proper tire inflation is important for achieving optimal fuel efficiency. Under-inflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel. Regularly check and maintain the recommended tire pressure specified on the doorjamb sticker to minimize rolling resistance and improve MPG.

Use the Panamera’s driving modes to your advantage. The “Normal” mode prioritizes fuel efficiency by optimizing throttle response and shift points. This mode won’t transform the Panamera GTS into a fuel sipper, but it can make a noticeable difference in everyday driving, especially in stop-and-go traffic.

Reduce unnecessary weight in the vehicle. Extra cargo adds to the car’s overall load, requiring more energy and therefore more fuel to accelerate and maintain speed. Remove any items that are not essential for your daily commute or trips to lighten the load and improve fuel economy.