25 MPG combined isn’t going to set any fuel efficiency records, but it’s the reality you accept when buying a 2021 Cadillac CT5 with all-wheel drive and the 2.0L turbocharged four-cylinder engine. This isn’t a Prius competitor; it’s a stylish, comfortable, and dynamically engaging sedan aimed at drivers who appreciate a touch of luxury and confident all-weather performance over outright frugality. The buyer is likely moving up from a mainstream sedan, or even downsizing from a larger, less fuel-efficient luxury car.

City and highway performance

The EPA estimates provide a deeper look at where the CT5’s fuel efficiency excels, and where it lags. In the city, the 2.0L turbo and ten-speed automatic manage 21 MPG. Stop-and-go traffic is never kind to fuel economy, but the smooth shifting of the transmission helps mitigate some of the losses. Out on the open road, the CT5 shines, achieving 31 MPG on the highway. This number shows the overdrive ratios in the 10-speed transmission and the engine’s ability to cruise efficiently at higher speeds. The cylinder deactivation system also contributes, shutting down two cylinders under light loads to conserve fuel.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2021 Cadillac CT5 AWD 2.0L 4-cyl is $2,300. This figure is based on driving 15,000 miles per year and using the EPA’s estimated combined fuel economy of 25 MPG. The calculation also assumes a national average fuel price, which fluctuates, of course. Your actual fuel costs will vary depending on your driving habits, the type of driving you do, and prevailing fuel prices in your area.

Real-world expectations

While the EPA estimates provide a useful baseline, real-world fuel economy often differs. Drivers who frequently encounter heavy traffic or have a heavy foot will likely see figures lower than the EPA estimates. Those who prioritize smooth acceleration and maintain consistent speeds on the highway may achieve results closer to, or even slightly exceeding, the 31 MPG highway rating. The CT5’s driver-selectable modes influence fuel efficiency as well. “Tour” mode prioritizes fuel economy with earlier upshifts, while “Sport” mode keeps the engine in a more responsive range, sacrificing some MPG in the process. Monitoring the instantaneous fuel economy display can help drivers adjust their habits to optimize efficiency.

How it compares

Compared to its competitors, the 2021 Cadillac CT5 AWD 2.0L’s fuel economy is generally competitive, but not class-leading. The BMW 330i xDrive achieves a slightly better 28 MPG combined, sacrificing a little visual flair for extra efficiency. The Mercedes-Benz C300 4MATIC clocks in at a similar 26 MPG combined. The Acura TLX 2.0T SH-AWD, a strong value play, lands right at 24 MPG combined. The CT5’s target buyer often prioritizes style, comfort, and Cadillac’s brand cachet over a marginal gain in fuel economy. For those seeking even better fuel efficiency within the Cadillac lineup, reviewing the all Cadillac fuel economy data is wise. Checking the CT5 MPG across all years is also worth doing.

Tips to maximize efficiency

Smooth and gradual acceleration is key to maximizing fuel economy in the CT5. The 2.0L turbo responds well to gentle throttle inputs, allowing the transmission to shift smoothly and keep the engine in its most efficient operating range. Avoid abrupt acceleration and hard braking, as these habits significantly reduce fuel economy.

Tire pressure plays a critical role in fuel efficiency. Ensure your tires are properly inflated to the recommended pressure listed on the driver’s side door jamb. Underinflated tires increase rolling resistance, which reduces fuel economy. Regular tire pressure checks are essential for optimal performance and safety.

Minimize idling whenever possible. Idling consumes fuel without covering any distance. If you anticipate being stationary for more than a minute or two, turn off the engine. This simple habit can significantly improve your overall fuel economy, especially in urban driving environments.

Limit the use of accessories that draw power from the engine. Air conditioning, especially on hot days, places a significant load on the engine, reducing fuel economy. Use air conditioning carefully and consider opening windows when appropriate. The same applies to other accessories like heated seats and rear defrosters.

Plan your routes strategically to avoid congested areas and minimize stop-and-go traffic. Using navigation apps to identify and avoid traffic bottlenecks can save fuel and reduce stress. A well-planned route allows for more consistent speeds and fewer opportunities for inefficient bursts of acceleration.