The 2017 Jaguar XJ 3.0L 6-cyl achieves 21 MPG combined. XJ buyers typically accept this, as they don’t prioritize fuel efficiency above all else. They want the XJ’s distinctive style, its sporting character, and its undeniable British luxury. They desire a full-size sedan that stands apart from the German establishment, and they’re willing to pay the price at the pump.

City and highway performance

The EPA estimates the 2017 XJ 3.0L at 18 MPG in the city and 27 MPG on the highway. These figures are representative of what to expect with a light foot. Stop-and-go traffic will decrease the city number, while consistent highway cruising (avoiding sudden acceleration or deceleration) may allow you to approach, or even slightly exceed, the EPA’s estimate. The supercharged 3.0L V6, while potent, consumes fuel, especially given that it powers a car weighing over 4,000 pounds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Jaguar XJ 3.0L at $2,750. This is based on driving 15,000 miles per year and using national average fuel prices. Note that premium fuel is required for the XJ, which will affect real-world numbers. Your personal fuel costs will vary depending on your driving habits, the proportion of city versus highway miles you drive, and the fuel prices in your region.

Real-world expectations

The EPA provides a standardized baseline, but real-world fuel economy can vary significantly. Aggressive driving, frequent short trips, and extended idling will all negatively impact fuel consumption. However, smooth acceleration, anticipatory braking, and careful use of cruise control will yield better results. Drivers who prioritize saving gas may find their mileage closer to the highway figure, particularly on longer journeys. They appreciate the available power and are likely to enjoy it. You can compare XJ MPG across all years to determine which model year is most fuel-efficient.

How it compares

Compared to its rivals, the 2017 XJ 3.0L’s fuel economy is on the low end for the segment. A comparable BMW 740i with its 3.0L inline-six achieves a more respectable 24 MPG combined. Even a V8-powered Mercedes-Benz S550 manages around 20 MPG combined, despite its greater power output. The Audi A8, equipped with a 3.0L supercharged V6, offers a slightly better 22 MPG combined. These differences matter for buyers who want a flagship sedan without high fuel costs. For drivers considering other options, you can view all Jaguar fuel economy data on our site.

Tips to maximize efficiency

While fuel efficiency isn’t the XJ’s strength, you can improve your MPG. The simplest approach is keeping your tires properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder burning more fuel.

Avoid aggressive acceleration and hard braking. The XJ’s supercharged engine responds eagerly to throttle input, but gentle acceleration will conserve fuel. Anticipate traffic flow and avoid sudden stops.

Minimize idling. If you’re stopped for more than a minute, turn off the engine. Modern engines restart reliably, and eliminating idle time will save fuel. This is relevant in city driving where stoplights are plentiful.

Use cruise control on the highway. Maintaining a consistent speed minimizes unnecessary acceleration and deceleration, optimizing fuel consumption. The XJ’s adaptive cruise control system enhances efficiency by maintaining a safe following distance and adjusting speed automatically.

Consider using the vehicle’s Eco mode, if equipped. Eco mode reduces throttle response and adjusts shift points to prioritize fuel efficiency. While it may diminish the XJ’s spirited performance, it can improve MPG.