The 2025 Cadillac XT6 AWD 3.6L gets 20 MPG combined. The XT6 buyer prioritizes space, luxury, and the security of all-wheel drive over ultimate fuel efficiency. This SUV isn’t really cross-shopped against a Prius. It is a vehicle for transporting families in comfort and style, where gasoline consumption is a known trade-off.

City and highway performance

The EPA estimates the XT6 AWD 3.6L will achieve 18 MPG in the city and 25 MPG on the highway. The city figure reflects stop-and-go driving, where the XT6’s weight and acceleration demands take their toll. The highway number is better, showcasing the benefits of the nine-speed automatic transmission. The transmission helps the engine settle into a more efficient cruising speed. These numbers represent the driving experience for suburban families using it as carpool vehicles and for running errands.

Annual fuel cost

The EPA says the annual fuel cost for the 2025 Cadillac XT6 AWD 3.6L is $2,200. This is based on driving 15,000 miles per year, using national average fuel prices. It’s a useful benchmark, but individual expenses will vary based on local gas prices, driving habits, and the ratio of city to highway miles driven. Expect to exceed this estimate if you drive many miles, especially in urban areas with higher fuel costs.

Real-world expectations

EPA figures provide a standardized measure, but your mileage may vary. Aggressive driving, frequent short trips, and carrying heavy loads will lower fuel economy. Gentle acceleration, consistent highway speeds, and diligent maintenance can help you achieve results closer to the EPA estimates.

Tire pressure is a factor. Properly inflated tires reduce rolling resistance, translating into fuel savings. These factors make all the difference to XT6 MPG across all years.

How it compares

The XT6’s fuel economy is normal for the three-row luxury SUV segment. The Acura MDX SH-AWD manages 19 MPG combined, while the Infiniti QX60 with AWD achieves 21 MPG. Meanwhile, a Volvo XC90 B6 AWD returns 22 MPG combined. The Genesis GV80 2.5T AWD, similarly sized but with only two rows, achieves 22 MPG combined. The differences are small.

The XT6 buyer likely values styling, features, and brand recognition more than small savings in fuel costs. They value the Cadillac’s blend of comfort and space even when examining all Cadillac fuel economy data.

Tips to maximize efficiency

The XT6’s 3.6L V6 responds well to smooth throttle inputs. Avoid aggressive acceleration, especially from a standstill, as this significantly reduces fuel economy. Anticipate traffic flow and maintain a steady speed when possible. The nine-speed automatic has been programmed to reach higher gears as quickly as possible without straining the engine, so let it do its job.

Use cruise control on the highway to maintain a consistent speed and minimize unnecessary acceleration and deceleration. This is effective on long road trips where variations in speed can quickly add up to wasted fuel. Consistent speeds also help reduce wear on the tires, lengthening their lifespan.

Reduce unnecessary weight in the vehicle. Extra cargo increases the engine’s workload, leading to lower fuel economy. Remove any items you don’t need, such as sporting equipment or tools. Even small amounts of weight can impact MPG, especially in city driving.

Ensure your XT6 receives regular maintenance, including oil changes and air filter replacements. A well-maintained engine operates more efficiently, maximizing fuel economy. Dirty air filters restrict airflow and require the engine to work harder, while old oil loses its lubricating properties and increases friction.

Consider using the XT6’s drive mode selector. Different modes adjust the engine and transmission settings for optimal performance. Selecting “Tour” or “Eco” modes, if available, can make the vehicle prioritize fuel efficiency over outright performance, even if it does not always result in significant changes.