The 2018 Jaguar XJL 3.0L achieves 21 MPG combined. This is a trade-off for buyers who want executive comfort and a driver-focused luxury experience, not necessarily the best fuel economy. Owners often value the long wheelbase, the supple leather, and the effortless power more than saving money on gas. For them, the XJL covers miles with exceptional comfort at a cost they find reasonable for the luxury provided. They likely have more fuel-efficient cars for daily use.

City and highway performance

EPA estimates for the 2018 Jaguar XJL 3.0L are 18 MPG in the city and 27 MPG on the highway. The difference shows how adaptable the engine is. Stop-and-go city driving, with its constant acceleration and braking, reduces fuel efficiency in a heavy car. On the open road, the XJL’s 8-speed automatic transmission allows relaxed cruising at highway speeds, and the supercharged V6 becomes most efficient. Careful driving might even exceed the 27 MPG highway figure.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Jaguar XJL 3.0L is $2,750. This is based on 15,000 miles per year and national average fuel prices, so your actual costs may vary depending on your driving, fuel type (premium is recommended), and local prices. This is a significant cost because the car is a large, luxurious sedan with a powerful engine. Owners can see XJL MPG across all years for more information.

Real-world expectations

The EPA figures are a useful point of reference, but real-world driving matters. The XJL’s supercharged V6 is responsive and encourages enthusiastic driving, which will lower fuel consumption. Frequent use of the Sport mode will bring MPG closer to the city rating, even on longer drives. Gentle acceleration, consistent speeds, and anticipating traffic will yield results closer to the highway rating. The car weighs approximately 4,000 lbs and has a large frontal area, so aero drag is a factor at highway speeds.

How it compares

The 2018 Jaguar XJL’s fuel economy is in line with its competitors. The BMW 740i, with a turbocharged inline-six, gets about 24 MPG combined. The Mercedes-Benz S450, also with a turbocharged six-cylinder, gets around 23 MPG combined. The Lexus LS 500, with its twin-turbo V6, gets around 22 MPG combined. These numbers show that high-performance luxury isn’t focused on efficiency. Buyers can also compare all Jaguar fuel economy data if they are interested in alternatives.

Tips to maximize efficiency

Avoid aggressive acceleration. The supercharged V6 has a lot of power, but try not to use full throttle often. Slow acceleration helps the engine stay efficient, saving fuel.

Check tire pressure regularly. Underinflated tires increase rolling resistance, making the engine work harder and use more fuel. Check the door jamb sticker for the correct tire pressure.

On long highway drives, use cruise control. Consistent speed minimizes acceleration and deceleration, saving fuel. Pay attention to traffic and be ready to turn it off.

Reduce idle time. Modern engines are efficient at idle, but idling still uses fuel. If you’ll be stopped for more than a minute or two, turn off the engine. The XJL restarts easily in most cases.

Use the driving modes. Experiment to find a mode that fits your driving. Eco mode can reduce throttle response and change transmission shift points to save fuel.