21 MPG combined. Those three words won’t sway any Prius shoppers, but they represent an acceptable practicality for the 2017 Jaguar XJL 3.0L. This isn’t a car designed to pinch pennies at the pump, it’s a rolling statement of success, comfort, and British heritage. Buyers of the long-wheelbase XJL aren’t prioritizing fuel efficiency above all else. They value the spacious rear seating, the supple leather, the growl of the supercharged V6, and the cachet of owning a Jaguar. The fuel economy is simply something they’re willing to live with.

City and highway performance

The EPA estimates the 2017 Jaguar XJL 3.0L at 18 MPG in the stop-and-go realities of city driving, and 27 MPG on the open highway. The city number reflects the demands placed on the supercharged V6 as it repeatedly hauls the XJL’s curb weight (over 4,000 pounds) from a standstill. The highway figure is more acceptable, showcasing the engine’s ability to cruise effortlessly at speed, aided by the smooth-shifting 8-speed automatic transmission. This transmission helps keep the engine in its sweet spot for efficiency on the highway.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2017 Jaguar XJL 3.0L is estimated at $2,750. This figure is based on driving 15,000 miles per year, using national average fuel prices. While individual costs will vary based on location and driving habits, this provides a standardized benchmark for comparison. Understanding this figure highlights the long-term cost of ownership, a factor weighed carefully by XJL buyers who are often acutely aware of their financial investments.

Real-world expectations

While the EPA numbers provide a useful baseline, remember that real-world fuel economy will vary depending on individual driving habits, road conditions, and even the specific region you live in. A lead foot will significantly decrease fuel economy, as will frequent short trips where the engine never fully warms up. Those who spend most of their time in congested urban environments will likely see numbers closer to, or even below, the 18 MPG city rating. Conversely, drivers who primarily use the XJL for long highway journeys may find they exceed the 27 MPG estimate. Consulting online owner forums and fuel tracking apps can provide a more nuanced understanding of what to expect in your specific circumstances. You can also view XJL MPG across all years, which can give you a greater understanding of the vehicle’s consistent fuel economy.

How it compares

Compared to other large luxury sedans, the 2017 Jaguar XJL’s fuel economy sits squarely in the middle of the pack. The Mercedes-Benz S550, with its larger V8 engine, typically achieves around 17 MPG city and 26 MPG highway. A BMW 740i, with its turbocharged inline-six, is generally rated slightly higher, around 21 MPG city and 29 MPG highway. The Lexus LS 460, known for its reliability, achieves similar numbers to the XJL, at around 16 MPG city and 24 MPG highway, depending on the year and drivetrain. These comparisons are useful for buyers weighing the pros and cons of each vehicle, acknowledging that a mile or two per gallon may be a secondary consideration alongside styling, performance, and brand appeal. Remember to compare all Jaguar fuel economy data when evaluating your options.

Tips to maximize efficiency

Take advantage of the Jaguar Drive Control system. Select “Eco” mode when appropriate, which adjusts throttle response and transmission mapping to prioritize fuel efficiency over outright performance. While this mode may slightly dampen the car’s sporty character, it can make a tangible difference in fuel consumption, especially during city driving.

Regular maintenance is critical for optimal fuel economy. Ensure that your XJL receives scheduled servicing, including oil changes, air filter replacements, and spark plug checks. A well-maintained engine runs more efficiently, maximizing the use of every gallon of fuel. Don’t neglect seemingly minor maintenance tasks, as they can collectively impact fuel economy.

Tire pressure plays an important role in fuel efficiency. Check your tire pressure regularly and inflate them to the recommended specification, which can be found on the driver’s side doorjamb. Underinflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel. A simple tire pressure check can improve both fuel economy and tire life.

Avoid aggressive driving habits such as rapid acceleration and hard braking. These actions place unnecessary strain on the engine and drivetrain, resulting in increased fuel consumption. Smooth, controlled driving not only improves fuel economy but also enhances the overall driving experience, aligning with the XJL’s refined character.

Minimize unnecessary weight in the vehicle. Remove any items in the trunk or cabin that are not essential, as extra weight reduces fuel economy. While the XJL is designed to carry passengers in utmost comfort, being mindful of the load can contribute to slightly better mileage in everyday driving.