25 MPG combined won’t top any fuel economy charts, but it’s a trade-off 2022 Cadillac CT4 2.7L buyers are generally okay with. This isn’t about hypermiling, it’s about owning a responsive, uniquely American sport sedan that offers a different experience than its European rivals. The CT4 2.7L offers usable power and a distinctive character, and its owners are often happy with the gas mileage.

City and highway performance

The CT4’s 2.7L turbo four-cylinder shows a split between city and highway fuel economy. The EPA estimates 21 MPG in city driving. This reflects the engine’s need to work harder in stop-and-go traffic. The automatic transmission, with 10 gears, tries to help, but the turbocharger’s spool-up time and the car’s weight still affect mileage. On the open road, the CT4 does better, achieving a respectable 31 MPG on the highway. The engine cruises at lower RPM, allowing the advanced transmission and efficient engine tuning to improve fuel economy. Aggressive driving will lower these numbers, especially on the highway, where it’s tempting to use the engine’s power.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Cadillac CT4 2.7L at $2,300. This figure assumes 15,000 miles per year, with 55% city and 45% highway driving, based on the national average fuel price when calculated. This is an *average*, and your actual fuel costs may be higher or lower depending on your driving habits, the type of fuel you use, and gas prices. If most of your driving is in the city or you tend to drive fast, expect to exceed $2,300. If you spend more time on the highway and drive conservatively, you might spend less.

Real-world expectations

While the EPA offers standardized fuel economy estimates, real-world results can vary. Many CT4 2.7L owners report numbers close to the EPA highway number during long trips. However, achieving the stated city MPG is often more challenging. Expect a range of 18-23 MPG in typical urban environments. A realistic combined MPG in mixed driving is usually around 23-27 MPG, although aggressive drivers will see numbers in the low 20s. The key to better fuel economy is understanding the engine and adjusting your driving.

How it compares

The CT4 2.7L is uniquely positioned compared to its rivals. The BMW 330i, a benchmark sport sedan, gets an EPA-estimated 28 MPG combined with its 2.0L turbo four-cylinder, which is much better. The Mercedes-Benz C300, another competitor, gets about 25 MPG combined, though some models dip into the low-20s based on options and drive configuration (RWD vs. 4MATIC). The Acura TLX, with its base 2.0L turbo, gets around 24 MPG combined. These numbers matter because buyers in this segment value fuel efficiency, performance, and luxury. CT4 2.7L buyers often value that American-style high-output turbo-4 which is very different than the smaller European and Japanese turbo mills. You can find all Cadillac fuel economy data to see how the CT4 fairs against the entire brand, and if you want to see CT4 MPG across all years that is easily accessible as well.

Tips to maximize efficiency

Use the CT4’s drive modes. “Tour” mode softens the throttle response and optimizes the transmission for fuel efficiency, improving MPG when cruising.

Avoid fast acceleration, especially from a stop. The 2.7L turbo engine performs better with a smooth driving style.

Keep tires properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure often and inflate them to the manufacturer’s specifications, usually on a sticker inside the driver’s side doorjamb.

Reduce idling time. Idling wastes fuel, especially in modern turbocharged engines. If you’ll be stopped for more than a minute or two, turn off the engine. Modern vehicles restart quickly, so the fuel saved often is more than the small amount used to restart.

Plan trips to avoid congested areas and peak traffic. Stop-and-go traffic dramatically lowers fuel economy by making the engine work harder. Use navigation apps to find efficient routes over time.