The 2021 Cadillac XT6 all-wheel drive with a 2.0L turbo four-cylinder engine gets an EPA estimated 23 MPG combined. While it’s not the most fuel-efficient SUV in its class, consider that it’s designed for families who value space, luxury, and safety, and are willing to accept the resulting gas mileage. They want three rows and are willing to pay for the Cadillac brand, recognizing the trade-offs.

City and highway performance

The EPA further specifies the XT6’s fuel economy, rating it at 21 MPG in the city and 26 MPG on the highway. The city number reflects the frequent stops and starts that many XT6 owners experience when driving kids, running errands, and navigating cities. The 26 MPG highway number is more appealing and achievable on longer road trips. While neither is particularly impressive alone, the highway number suggests that the XT6 is reasonably efficient when cruising at a constant speed, a nice feature for family vacations. The nine-speed automatic transmission helps optimize efficiency at higher speeds by keeping the engine at a lower RPM when possible.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Cadillac XT6 AWD 2.0L 4-cyl at $2,500. This is based on 15,000 miles per year and national average fuel prices, which can change a lot. This cost could be spent on family vacations, home improvements, or savings. It’s a significant expense, especially compared to more fuel-efficient vehicles. Consider this cost, particularly if you drive more than 15,000 miles annually or if local fuel prices are above average. Potential owners should include this in their long-term cost calculations. See XT6 MPG across all years for some perspective.

Real-world expectations

EPA estimates are a good starting point, but actual fuel economy can vary based on driving habits, road conditions, and weather. Quick acceleration, hard braking, and heavy loads will reduce efficiency. Colder temperatures can also reduce MPG, especially on short trips. Drivers who mainly drive in the city should expect about 21 MPG, while those who drive more on the highway may get close to 26 MPG, or even better with careful driving. Many owners report that 23 MPG is a realistic expectation for daily driving.

How it compares

The Cadillac XT6’s fuel economy is competitive, but not the best, compared to other three-row luxury SUVs. The Acura MDX, a popular option, gets 19 MPG city and 26 MPG highway with its standard V6 and SH-AWD. The Lexus RX 350L gets 19 MPG city and 26 MPG highway with its V6 and optional AWD. The Infiniti QX60 offers similar space and delivers around 20 MPG city and 27 MPG highway. Choosing one of these won’t save you much money on gas. For better fuel economy, consider the Volvo XC90 T8 plug-in hybrid, which is more expensive but offers much better fuel economy, especially in city driving, due to its electric motor. Cadillac shoppers who want better fuel economy can see all Cadillac fuel economy data to see if another model fits their needs, such as the smaller Cadillac XT4.

Tips to maximize efficiency

Correct tire inflation is important for getting the best fuel economy. Check your tires often and make sure they’re at the pressure listed on the sticker on the driver’s side doorjamb. Even a few PSI below the recommended pressure can reduce fuel efficiency.

Avoid aggressive driving. Fast acceleration and hard braking waste fuel. Smooth acceleration and anticipating traffic can improve your MPG. Use cruise control on the highway to keep a steady speed.

Reduce weight. Extra cargo adds weight, which reduces fuel economy. Remove unnecessary items from the vehicle. Also, remove roof racks or cargo carriers when not in use, as they create drag that can reduce fuel efficiency at higher speeds.

If equipped, consider the driving mode. Some XT6 trims offer driving modes that prioritize fuel economy. select “Eco” or “Tour” mode when possible to optimize the engine and transmission for efficiency. Know the characteristics of each mode and use them to your advantage.

Regular maintenance is important. A well-maintained engine runs more efficiently. Follow the manufacturer’s maintenance schedule, including oil changes, air filter replacements, and spark plug maintenance. A neglected engine can lose efficiency, reducing your fuel economy, and potentially leading to expensive repairs.