The 2021 Cadillac XT6 with front-wheel drive and a 3.6L 6-cylinder engine gets 21 MPG combined. This figure might not be the best, but it likely won’t deter XT6 buyers. The XT6 focuses on comfortable and stylish family transportation, prioritizing space, features, and Cadillac branding over top fuel efficiency. It’s built for buyers who need a three-row SUV, like Cadillac’s blend of luxury and tech, and are okay with average gas mileage.

City and highway performance

The EPA estimates the 2021 Cadillac XT6 FWD gets 19 MPG in the city and 26 MPG on the highway. That 7 MPG difference shows how much stop-and-go driving affects fuel economy. The 3.6-liter V6, while smooth and powerful enough, has to work harder in city conditions, reducing any gas savings from the nine-speed automatic transmission. Out on the highway, the transmission selects the right gear, and the engine works less, which helps the fuel economy to be acceptable for a vehicle of this size and weight.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Cadillac XT6 FWD at $2,100. This is based on driving 15,000 miles per year, 55% in the city and 45% on the highway. The calculation also uses the national average fuel price when tested, which can change. While useful, the actual cost will change based on driving habits and local fuel prices.

Real-world expectations

The EPA’s standardized testing is usually trustworthy, but real-world fuel economy can differ from the official numbers. Factors like driving style, traffic, weather, and tire pressure can change your MPG. Aggressive acceleration and hard braking will lower fuel economy. The XT6 can encourage a heavier foot because of its power and ride quality. Owners who accelerate smoothly, drive at consistent speeds, and keep tires properly inflated can get numbers closer to the EPA estimates. For more information, you can view XT6 MPG across all years.

How it compares

The XT6’s fuel economy is about average for its class. A Lexus RX 350L offers a smaller third row and less cargo space, but it gets a comparable 22 MPG combined, which might sway buyers who want reliability and better fuel efficiency. The Acura MDX gets 22 MPG combined in its front-wheel-drive version. Choosing all-wheel drive on these vehicles usually drops fuel economy by 1-2 MPG. With its turbocharged engine, the Lincoln Aviator has a combined MPG in the low 20s, especially with all-wheel drive, because it uses more fuel.

Tips to maximize efficiency

Avoid aggressive acceleration. The 3.6-liter V6 responds well to a light touch, and speeding up too fast will waste gas. Try to maintain a steady pace to minimize the need for sudden bursts of power.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, making the engine work harder and reducing gas mileage. Check your tire pressure and inflate them to the recommended levels on the tire placard.

Minimize idling. Idling consumes fuel without driving. If you’re stopped for more than a minute, consider turning off the engine, especially in the city.

Use cruise control on the highway. Maintaining a consistent speed on the highway reduces acceleration and braking, optimizing fuel efficiency. Cruise control works best on flat terrain.

Reduce weight and aerodynamic drag. Remove unnecessary items from the XT6, as extra weight reduces fuel economy. Avoid using roof racks or carriers unless they’re needed, as they increase aerodynamic drag and decrease efficiency. For all Cadillac information, see all Cadillac fuel economy data.