20 MPG combined is what you get when driving the 2018 Jaguar XJL AWD with its supercharged 3.0L V6. It’s a number unlikely to thrill those accustomed to modern hybrid powertrains, yet entirely expected, perhaps even inconsequential, to the specific kind of buyer drawn to the XJL. This isn’t someone shopping for maximum efficiency; this is someone prioritizing spaciousness, understated British elegance, and the confident grip of all-wheel drive in a flagship sedan. They accept the fuel consumption as the cost of enjoying a car that prioritizes luxury and driving experience over outright economy.

City and highway performance

The EPA estimates 17 MPG in the city. This reflects the reality of stop-and-go traffic where the supercharged V6’s power is eagerly accessed, and the XJL’s considerable weight demands more energy to get moving. On the open road, the 25 MPG highway rating is far more palatable and shows the benefits of the smooth-shifting eight-speed automatic transmission in keeping the engine at optimal RPM. Long-distance cruises are where the XJL truly shines, effortlessly swallowing miles while cocooning its occupants in quiet comfort. The highway figure is respectable for a vehicle of this size and horsepower, but the city driving frequently impacts the overall average.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2018 Jaguar XJL AWD at $2,900. This figure is based on driving 15,000 miles per year, assuming a national average fuel price. While this is a useful benchmark for initial budgeting, actual costs can vary significantly based on individual driving habits, local fuel prices, and the percentage of city versus highway miles driven. Drivers who primarily use their XJL for shorter commutes in congested urban environments can expect to exceed this estimate, while those who frequently embark on longer highway journeys may find their annual fuel expenditure slightly lower.

Real-world expectations

While the EPA provides a standardized testing methodology, real-world fuel economy can differ considerably. Aggressive driving, frequent acceleration, and extended idling will all negatively impact fuel consumption. Conversely, smooth, consistent driving with minimal hard braking can often yield results closer to the EPA’s highway estimate, even during mixed driving. Owners often report slightly lower figures than the combined EPA rating, particularly in areas with heavy traffic congestion. Those seeking to confirm these findings can examine XJL MPG across all years for owner reported real-world data.

How it compares

Compared to its rivals, the 2018 Jaguar XJL’s fuel economy is acceptable. The BMW 740i xDrive, with its turbocharged 3.0L inline-six, achieves around 24 MPG combined, making it a slightly more efficient choice. The Mercedes-Benz S450 4MATIC posts figures in the same ballpark. The Audi A8, especially equipped with its mild-hybrid system, often edges out the XJL in fuel economy. These improvements often matter less to XJL buyers than the unique styling and driving feel that Jaguar provides. Buyers may find all Jaguar fuel economy data interesting as they weigh pros and cons.

Tips to maximize efficiency

Given the XJL’s supercharged engine, gentle throttle inputs are important for maximizing fuel economy. Avoid sudden acceleration and try to maintain a steady speed, especially during city driving. Anticipate traffic flow and brake smoothly to reduce the need for frequent hard acceleration, allowing the engine to operate more efficiently.

Proper tire inflation is essential for optimizing fuel efficiency. Check your tire pressure regularly and ensure they are inflated to the recommended levels specified on the doorjamb sticker. Underinflated tires increase rolling resistance, forcing the engine to work harder and consuming more fuel.

The XJL’s eight-speed automatic transmission is programmed to shift efficiently, but you can further improve fuel economy by using the “Eco” driving mode when appropriate. This mode adjusts throttle response and shift points to prioritize fuel efficiency, making it ideal for highway cruising or less demanding driving situations. Remember to switch back to a more responsive mode when you desire spirited driving.

Reduce unnecessary weight in the vehicle. Remove any items from the trunk or passenger area that are not essential. Extra weight places additional strain on the engine, leading to increased fuel consumption. A lighter car is always a more efficient car.

Regular maintenance, including oil changes and air filter replacements, plays a vital role in maintaining optimal fuel economy. A clean air filter ensures proper airflow to the engine, while fresh oil reduces friction and improves lubrication, both contributing to more efficient operation. Follow the manufacturer’s recommended maintenance schedule to keep your XJL running smoothly and efficiently, preventing any issues that could negatively impact fuel consumption.