The 2018 Porsche Cayenne S with its 3.6L 6-cyl engine gets 20 MPG combined. This fuel consumption figure demands attention given today’s fuel prices, but owners often accept it in exchange for a blend of performance, luxury, and practicality that few SUVs can match.

City and highway performance

The Cayenne S, with its 3.6L V6 engine and eight-speed automatic transmission, balances quick driving with reasonable efficiency. The EPA estimates 17 MPG in the city. Stop-and-go traffic and the Cayenne’s weight affect this figure, reflecting the reality of urban driving. On the open road, the 2018 Cayenne S achieves a more respectable 24 MPG on the highway. The eight-speed transmission helps optimize fuel consumption at higher speeds, but even this number is unlikely to impress cross shoppers looking for the best gas mileage.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,900 for the 2018 Porsche Cayenne S. This calculation is based on driving 15,000 miles per year and using national average fuel prices, which fluctuate. Buyers must weigh this cost against the ownership experience and other available options. This figure shows that performance and luxury often come at a price, not just in the initial purchase, but also in running costs. Consider checking all Porsche fuel economy data for more context.

Real-world expectations

While the EPA provides a standard, fuel economy can vary based on driving habits, road conditions, and maintenance. Quick acceleration, frequent hard braking, and neglecting maintenance can quickly lessen fuel efficiency. However, mindful driving and well-maintained tires can come close to the EPA estimates, or even slightly exceed them.

The Cayenne’s onboard computer provides real-time and average MPG readouts, allowing drivers to monitor their performance and adjust their driving. Even with careful driving, the Cayenne S won’t rival a hybrid in terms of fuel costs.

How it compares

The 2018 Porsche Cayenne S is in a middle ground when compared to its competitors. The BMW X5 xDrive35i achieves a similar combined MPG rating of 20 MPG, while offering a somewhat different driving experience. The Audi Q7 3.0T with its supercharged V6 hovers around 19 MPG combined. The Acura MDX is a less direct competitor, but its 22 combined MPG rating (for a non-SH-AWD trim) shows that three row SUVs can deliver better fuel economy. Those considering the Cayenne S are often willing to sacrifice some fuel efficiency for its performance and brand. It is also important to compare CAYENNE MPG across all years to understand trends over time. The buying decision centers on priorities, with fuel costs balanced against other attributes.

Tips to maximize efficiency

Avoid aggressive acceleration and braking. The Cayenne S is built for performance, so exploiting that at every opportunity will lower fuel economy. Gentle acceleration from a stop and anticipating traffic flow can make a difference, especially in city driving. The temptation to use the Cayenne’s power is strong, but resist it when possible.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, which directly impacts fuel efficiency. Check your tire pressure regularly and inflate them to the recommended levels found on the door jamb sticker. This is a simple but effective way to improve gas mileage.

Minimize idling time. Excessive idling consumes fuel without covering any distance. If you’re stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, but prolonged idling simply wastes fuel. The Cayenne S does not have auto stop-start to counter this issue.

Use cruise control on the highway. Maintaining a constant speed on the highway can improve fuel efficiency. Cruise control helps minimize speed fluctuations, which can consume more fuel. Be mindful of the road conditions and traffic patterns, and disengage cruise control when necessary for safety.

Ensure regular maintenance. A properly maintained engine runs more efficiently. Follow the manufacturer’s recommended maintenance schedule, including oil changes, air filter replacements, and spark plug replacements. Neglecting maintenance can lead to decreased performance and reduced fuel economy. This includes keeping your alignment in spec; the Cayenne S’s sporty suspension settings are easily knocked out of alignment, which then accelerates tire wear and drags down fuel economy.