The 2015 Jaguar XJ FFV with the 3.0L V6 gets 21 MPG combined. It’s not a Prius, and doesn’t try to be. The XJ suits buyers who value elegant design, a very comfortable ride, and the Jaguar brand over fuel efficiency. They know that this distinctive experience costs more, and that gasoline is part of that. The supercharged V6 offers effortless power and a refined growl, qualities that are more appealing to the XJ’s target market than saving every possible mile per gallon.

City and highway performance

The EPA estimates 18 MPG in the city and 27 MPG on the highway, which reflects the dual nature of the XJ’s driving. The city number shows the engine working harder as it moves the fairly heavy sedan from stoplight to stoplight. The highway number is more appealing, and easier to reach, as the eight-speed automatic transmission shifts into higher gears, letting the engine cruise at lower RPMs. The XJ’s suspension performs well on the open road, absorbing bumps and providing a truly quiet driving experience. The XJ excels on long highway trips, reducing the impact of its less impressive city fuel economy.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Jaguar XJ FFV 3.0L at $2,750. This is based on driving 15,000 miles per year, with a set percentage for city versus highway driving, and using the national average fuel price at the time. This number is a standardized way to compare the XJ’s running costs with other vehicles. Drivers who are more aggressive, drive mostly in cities, or who pay higher local fuel prices should expect to spend more. This is an important number to think about, especially for those on a budget, but for many XJ owners, it’s just another cost of owning a luxury car.

Real-world expectations

The EPA provides a standard measurement, but real-world fuel economy can change a lot depending on driving style, traffic, and even tire pressure. Expect numbers close to the EPA’s estimates only if you drive carefully and spend a lot of time on the highway. Fast acceleration, frequent stops, and heavy traffic will all lower fuel economy. Owners who drive mostly in urban areas should expect to average closer to the city MPG, while those who often take long road trips have a good chance of exceeding the highway estimate. Tracking your own fuel use will give you a true idea of what the XJ costs to run for you.

How it compares

The 2015 Jaguar XJ’s fuel economy is about average compared to other luxury sedans in its class. A 2015 BMW 740i, for instance, gets a similar 22 MPG combined with its turbocharged inline-six. The Mercedes-Benz S550 from the same year, with its more powerful V8 engine, gets about 20 MPG combined. The Audi A8 3.0T, another supercharged V6 option, also posts similar numbers, around 22 MPG. These small differences don’t greatly affect the ownership experience. The decision often depends on things like styling, brand preference, and the features of each vehicle. However, checking XJ MPG across all years can help you decide if fuel economy matters to you.

Tips to maximize efficiency

Look ahead and anticipate traffic. This reduces hard acceleration and braking, letting the engine run more efficiently within its best RPM range. Gentle acceleration is also important. Avoid pressing the gas pedal hard unless you need to. The supercharged engine responds well, even with moderate throttle, so you rarely need to push it hard.

Make sure your tires are inflated properly. Underinflated tires increase rolling resistance, which makes the engine work harder and use more fuel. Check your tire pressure often, look at the sticker on the driver’s side doorjamb for the correct PSI, and inflate them to the recommended levels.

Reduce the use of accessories like air conditioning, especially on short trips. The AC compressor takes power from the engine, which affects fuel economy. When you can, open the windows or use the ventilation system instead. Consider installing window tint to reduce the need for AC in hot weather.

Regular maintenance is important for good fuel economy. Make sure your XJ gets its scheduled oil changes, air filter replacements, and spark plug replacements according to Jaguar’s service schedule. A well-maintained engine runs more efficiently and is less likely to have problems that can hurt MPG. Explore all Jaguar fuel economy data to see trends that might impact your maintenance decisions.