21 MPG combined won’t win any fuel economy awards, but that’s what you can expect from the 2019 Jaguar XJL with its supercharged 3.0L V6. Buyers of the long-wheelbase XJL likely aren’t prioritizing thriftiness; they’re purchasing a luxurious, spacious sedan with a sporting character reminiscent of Jaguar’s heritage. They accept the fuel economy as a trade-off for the performance and prestige the XJL offers.

City and highway performance

The EPA estimates the XJL’s city driving fuel economy at 18 MPG, reflecting the inefficiencies of stop-and-go traffic. The supercharged engine, which is both responsive and powerful, needs to spool up frequently. On the highway, the numbers improve considerably, reaching 27 MPG. The XJL’s eight-speed automatic transmission helps achieve this, allowing the engine to cruise at lower RPMs, which results in better fuel consumption. The long wheelbase also promotes stable, relaxed highway driving, encouraging a smoother driving style that benefits fuel efficiency.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Jaguar XJL 3.0L at $2,750. This figure assumes 15,000 miles per year, with 45% of those miles driven in the city and 55% on the highway, using national average fuel prices. Note that real-world fuel prices fluctuate regionally, so your actual fuel costs may vary. Aggressive driving or consistent stop-and-go traffic can increase that number.

Real-world expectations

While EPA estimates provide a standardized baseline, your mileage may vary, based on your personal driving style. Aggressive drivers will likely see significantly lower figures than those with a gentler touch. Consider your typical driving environment, as hilly terrain, extreme temperatures, and heavy traffic all negatively impact fuel consumption. Careful and conscious driving may allow some owners to see figures approaching, or even slightly exceeding, the EPA highway estimate, while others could struggle to hit the combined number. For more information, investigate XJL MPG across all years and compare user-reported data.

How it compares

Competitors like the BMW 740i achieve similar fuel economy, with an EPA-estimated 21 MPG combined. The Mercedes-Benz S450 also has similar numbers. For Jaguar XJL buyers, fuel economy often isn’t the biggest purchase factor, as all of these large luxury sedans have similarly thirsty engines. However, shoppers might consider an Audi A8 3.0T, which delivers a slightly better 22 MPG combined. Those willing to sacrifice some space can look at models like the BMW 540i, which returns 25 MPG combined. View all Jaguar fuel economy data for a broader perspective. The XJL’s appeal lies more in its distinctive design, luxurious interior, and engaging driving experience.

Tips to maximize efficiency

To conserve fuel in your XJL, avoid rapid acceleration. The supercharged V6 is responsive, but each burst of speed costs fuel. Smooth and gradual acceleration helps to avoid unnecessary fuel consumption, especially in city driving where quick starts are common. Try to anticipate traffic flow and maintain a steady speed whenever possible.

Regular maintenance is important for optimizing fuel efficiency. Keep your tires properly inflated to the recommended pressure, because low tire pressure increases rolling resistance that forces the engine to work harder. Adhere to Jaguar’s recommended service schedule, ensuring that the engine is properly tuned and that components are in good working order, which means regular oil changes and keeping the air filter clean.

Reduce unnecessary weight in the vehicle. Extra cargo in the trunk or back seat adds to the load, which burns more fuel. Remove unnecessary items, especially for longer trips. Consider whether you need roof racks or cargo carriers, as these create aerodynamic drag. If you need them, use them, but avoid having them permanently attached.

When on the highway find the right situation to cruise control. Cruise control helps maintain a constant speed, and small speed variations are fuel inefficient. By maintaining a consistent speed and removing the human element, cruise control usually optimizes fuel usage on the highway, particularly on longer trips.