2021 Cadillac XT6 Fuel

 In 2021, a turbocharged four-cylinder engine will be added to the Cadillac XT6 lineup as part of the new entry-level Luxury trim level. The turbo four-cylinder engine, which is shared with the smaller XT5 SUV, produces 237 horsepower and is mated to a nine-speed automatic transmission and either front- or all-wheel drive. The 310-hp V-6 engine remains standard on Premium Luxury and Sport models. Apple CarPlay and Android Auto are now standard across the lineup, and the top-tier Sport model gets new 20-inch wheels.

2021 Cadillac XT6

2021 Cadillac XT6 Fuel

According to the EPA, the 2021 Cadillac  XT6 with the standard turbo-four will achieve up to 21 mpg in the city and 27 mpg on the highway. Models with the V-6 engine can achieve up to 19 mpg in the city and 26 mpg on the highway. The all-wheel-drive XT6 we drove on our 75-mph highway fuel-economy route as part of our extensive testing yielded a less rosy 22 mpg. For comparison, the Mercedes-Benz GLE450 we tested on that route received a score of 23.

Cadillac XT6 Gas Mileage

The Cadillac XT6's turbo-four engine gets 21 mpg in the city and 27 or 26 mpg on the highway, depending on whether it has front- or all-wheel drive. These are excellent ratings for the luxury midsize SUV category. Models with the V6 get 18 to 19 mpg in the city and 25 to 26 mpg on the highway, which is more typical for the segment and more comparable because many competitors have six-cylinder engines.

Keep in mind that the four-cylinder Cadillac uses premium gasoline, whereas the V6 uses regular. This means that the four-annual cylinder's fuel costs may be higher than the V6's. Despite its higher rating, the EPA estimates that fueling the four-cylinder model will cost around $250 more per year than the V6.