23 MPG combined isn’t a winning number for the 2018 Jaguar XF 3.0L 6-cyl, but it’s a compromise accepted by drivers seeking a distinctive blend of sporting character and British luxury. This isn’t a car purchased primarily for its fuel efficiency. It’s a car chosen for its sharp handling, refined ride, and the sound of its supercharged V6. The fuel economy, while not class-leading, is simply the price to pay.

City and highway performance

The EPA estimates for the 2018 XF 3.0L are 20 MPG in the city and 29 MPG on the highway. The city figure reflects the realities of stop-and-go driving, where the supercharged engine’s responsiveness can hurt fuel conservation. The automatic transmission, though equipped with eight gears, will still downshift aggressively when prompted, using fuel accordingly. On the open road, however, the XF’s long gearing and relatively light weight (compared to some competitors) allow it to achieve a respectable highway figure. 29 MPG is achievable when cruising at a steady speed, making it a comfortable and reasonably efficient long-distance tourer.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,500 for the 2018 Jaguar XF 3.0L 6-cyl. This figure is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs will vary depending on your driving habits, the type of fuel you purchase (premium fuel is recommended), and the prices in your area. Drivers with longer commutes or a penchant for spirited driving should expect to exceed this number, while those who drive primarily on the highway may see a slightly lower annual cost.

Real-world expectations

The EPA estimates provide a useful benchmark, but real-world fuel economy often differs. Owners of the 2018 Jaguar XF 3.0L often report slightly lower combined MPG than the official 23 MPG. This discrepancy often stems from driving styles. The supercharged V6 is responsive and encourages drivers to use its power, which inevitably impacts fuel consumption. And the Jaguar’s sporty character is great for winding roads and enthusiastic acceleration, activities that penalize fuel economy. Disciplined drivers who prioritize smooth acceleration and consistent speeds can often achieve figures closer to the EPA estimates. If ultimate fuel efficiency was the priority, buyers wouldn’t likely be considering a Jaguar.

How it compares

Compared to its competitors, the 2018 Jaguar XF 3.0L’s fuel economy sits firmly in the middle of the pack. The BMW 540i xDrive, with its turbocharged inline-six, achieves an EPA-rated 24 MPG combined. The Mercedes-Benz E400, another competitor with a boosted six-cylinder, is similarly rated around 23 MPG. The Audi A6 3.0T is also rated at 24 MPG combined. These small differences are unlikely to be the deciding factor for most buyers. The choice often boils down to styling, driving dynamics, and brand preference. However, if fuel economy is important, some hybrid options, like the Lexus GS 450h (rated around 31 MPG combined), offer a significantly more efficient alternative. Remember to check XF MPG across all years if you’re considering a model beyond 2018.

Tips to maximize efficiency

The supercharged V6 is responsive and encourages enthusiastic driving, but resist the urge to constantly accelerate hard. Smooth, gradual acceleration is key to minimizing fuel consumption. Anticipate traffic flow and avoid unnecessary braking, which wastes kinetic energy and forces the engine to work harder to regain speed.

Use the XF’s driving modes. Selecting the “Eco” mode will optimize engine and transmission settings for fuel efficiency, reducing throttle response and encouraging earlier upshifts. While it may slightly dampen the car’s sporty character, it can make a noticeable difference on longer journeys. Use it when cruising on the highway.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and burn more fuel. Check your tire pressure regularly and maintain the recommended levels listed on the sticker inside the driver’s side door. While you’re at it, make sure the tires are a model known for low rolling resistance.

Reduce unnecessary weight. Carrying excess cargo in the trunk adds weight and reduces fuel economy. Remove anything that’s not essential, such as golf clubs or rarely used tools. Every pound saved contributes to improved efficiency. Proper maintenance, like regular oil changes and air filter replacements, can also help maintain optimal engine performance and fuel economy. A clean engine runs more efficiently.

Pay attention to speed. Aerodynamic drag increases exponentially with speed, so driving at higher speeds consumes significantly more fuel. Maintaining a consistent speed within the posted speed limit, particularly on the highway, will yield improvements in fuel economy. Posted speed limits may be the maximum legal speed, not necessarily the most fuel-efficient speed.

You can find all Jaguar fuel economy data here.