18 MPG combined. That figure is beside the point for anyone seriously considering a 2019 Jaguar XJL with the supercharged 5.0-liter V8. This isn’t a car bought for practicality; it’s purchased for presence, for the joy of a snarling, refined powerhouse propelling a long-wheelbase luxury sedan. The fuel bill is the price of admission to a very exclusive club.

city and highway performance

The EPA estimates 15 MPG in the city for the XJL 5.0L, a figure reflecting the engine’s thirst when navigating stop-and-go traffic. The supercharger works hard to move this sizable sedan from a standstill, and that requires fuel.

On the open road, however, the XJL fares slightly better, achieving 23 MPG on the highway. This relatively modest improvement underscores that while the engine doesn’t require constant bursts of power, it’s still a large-displacement V8 working to overcome considerable weight and aerodynamic drag, even at cruising speeds.

annual fuel cost

The EPA calculates the annual fuel cost for the 2019 Jaguar XJL 5.0L at $3,200, based on driving 15,000 miles per year and using national average fuel prices. This figure is a starting point, of course, as fuel costs fluctuate and individual driving habits vary. Someone primarily driving in congested city conditions should anticipate exceeding this figure, while someone primarily on the highway *might* see a slightly lower number. This is important when viewing XJL MPG across all years, as even small changes to fuel costs change the annual amount you pay.

real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy for the XJL 5.0L is heavily influenced by driving style. Aggressive acceleration and frequent hard braking will significantly decrease fuel efficiency. Conversely, a smooth, consistent driving style, making use of the car’s ample torque at lower RPMs, can help nudge the numbers closer to the EPA estimates, or even slightly above on long highway trips.

how it compares

The XJL 5.0L competes with other high-performance luxury sedans, and its fuel economy generally reflects its segment. A Mercedes-Benz S560 with its 4.0L biturbo V8 posts similar numbers, around 17 MPG combined. The BMW 750i, similarly equipped with a twin-turbo V8, also hovers in the same fuel efficiency range. An Audi A8 with the available V8 might eke out slightly better mileage, but its driving experience is notably different. For buyers in the market for a long-wheelbase luxury car, all Jaguar fuel economy data is useful, but they’re likely more focused on performance, features, and prestige than fuel savings. The decision isn’t between 18 MPG and 30 MPG; it’s about selecting the specific flavor of luxury they desire.

tips to maximize efficiency

While fuel economy may not be the primary concern for XJL owners, there are still several steps to minimize fuel consumption without sacrificing the driving experience. Avoid excessive idling. The supercharged V8 consumes a significant amount of fuel even when stationary. If you are stopped for more than a minute or two, turn off the engine.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Regularly check and inflate your tires to the pressure recommended on the sticker located on the driver’s side door jamb.

Use high-quality premium fuel. The supercharged engine’s performance and efficiency are optimized for premium fuel with a higher octane rating. Using lower-grade fuel can decrease performance and potentially harm the engine in the long run.

Anticipate traffic flow and maintain a smooth, consistent speed whenever possible. Avoid aggressive acceleration and hard braking, which consume significantly more fuel. Use cruise control on the highway to maintain a steady speed and optimize fuel efficiency.

Keep up with scheduled maintenance. Regular oil changes, air filter replacements, and spark plug maintenance all contribute to optimal engine performance and fuel efficiency. It’s also important to make sure the car’s computer has the latest software updates from Jaguar as these contain revised fuel management strategies to improve XJL MPG across all years.