The 2024 Cadillac XT6 AWD, equipped with the 3.6L V6, gets a combined fuel economy rating of 21 MPG. This isn’t a stellar number, but it’s perfectly acceptable for the XT6. It’s a comfortable, well-equipped, and spacious three-row SUV primarily purchased by families who are focused on secure, confident transportation rather than squeezing out every last mile per gallon.

City and highway performance

The EPA estimates the XT6 at 18 MPG in the city. Stop-and-go traffic and idling naturally impact fuel consumption, and the XT6’s weight doesn’t help. The XT6 performs better on the open highway, achieving 25 MPG. This figure is more representative of steady-state cruising and shows the engine’s efficiency when it’s not constantly accelerating and decelerating. The nine-speed automatic transmission plays a key role here, allowing the engine to operate at lower, more efficient RPMs at higher speeds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Cadillac XT6 AWD at exactly $2,100. This figure is based on driving 15,000 miles per year and using the national average fuel price. Your actual fuel costs will vary depending on how many miles you drive, your driving style, and the price of gasoline in your area. However, the $2,100 estimate provides a useful benchmark for comparing the XT6’s fuel costs against other vehicles.

Real-world expectations

EPA estimates provide a standardized benchmark, but real-world fuel economy often differs. XT6 owners will typically see figures that align with EPA estimates if they prioritize smooth acceleration, avoid excessive idling, and maintain consistent speeds on the highway. Aggressive driving habits, frequent short trips, and neglecting routine maintenance will negatively impact fuel consumption. Payload also plays a role. Regular heavy loads, especially a full complement of passengers, reduce gas mileage.

How it compares

The XT6 operates in a competitive segment. The Acura MDX SH-AWD, for example, manages 19 MPG combined, making it slightly less efficient. The Lexus RX 350 AWD achieves 25 MPG combined, giving it a noticeable advantage. Even the Volvo XC90 B6 AWD comes in at a combined 22 MPG. These differences matter to some buyers, but many XT6 customers ultimately prioritize the Cadillac’s unique styling and available features over marginal differences in fuel economy. If optimal fuel economy is your primary goal, exploring hybrid options like the Lexus RX 450h+ (83 MPGe combined) might be a better fit.

Tips to maximize efficiency

Avoid aggressive acceleration. The 3.6L V6 offers ample power, but frequently stomping on the accelerator will significantly reduce your MPG. Gentle acceleration allows the engine to operate more efficiently and minimizes fuel consumption.

Maintain consistent tire pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate your tires to the recommended level found on the driver’s side doorjamb. This is especially important on a heavy vehicle like the XT6.

Minimize idling. Excessive idling wastes fuel. If you anticipate being stationary for more than a minute or two, turn off the engine. Modern vehicles are designed to restart quickly and efficiently, so there’s no need to let the engine run unnecessarily.

Ensure your vehicle is properly maintained. Regular maintenance, including oil changes and air filter replacements, keeps your engine running efficiently. A neglected engine will consume more fuel and may also experience performance issues. You can view all Cadillac fuel economy data here, including XT6 MPG across all years.