24 MPG combined isn’t going to win any awards, but it’s a reasonable compromise for the 2025 Cadillac CT4 AWD with its 2.7L turbocharged engine. This isn’t a hybrid commuter car; it’s a small luxury sedan that prioritizes performance and sure-footedness, and its fuel economy reflects that balance. People buying this car are often more concerned with responsive acceleration and confident handling in all weather conditions than squeezing every last mile out of a gallon of fuel. They value the prestige of the Cadillac brand and the CT4’s sporty character, and they are prepared to accept the fuel cost that comes with it.

City and highway performance

The EPA estimates the 2025 CT4 AWD 2.7L will achieve 21 MPG in the city and 29 MPG on the highway. The lower city figure reflects the engine working harder during stop-and-go traffic, using the turbocharger more frequently and thus consuming more fuel. The highway number is where this engine can perform well, allowing the 10-speed automatic transmission to settle into its higher gears, reducing engine RPM, and improving efficiency. 29 MPG on the highway is respectable for a vehicle of this type, suggesting that longer trips will be less punishing at the pump.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2025 Cadillac CT4 AWD 2.7L is $2,400. This figure is based on driving 15,000 miles per year and using national average fuel prices. The actual cost will vary depending on individual driving habits, local fuel prices, and the specific grade of gasoline used. Remember that $2,400 is an average, and your personal fuel expenses could be higher or lower.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy often differs. The aggressive nature of the 2.7L turbo encourages spirited driving, which is likely to dip below the EPA estimates. Heavy acceleration, frequent use of Sport mode, and consistent short trips will all contribute to lower MPG figures. On the other hand, disciplined highway driving and a light foot on the accelerator could allow drivers to match or even slightly exceed the 29 MPG highway rating. Maintaining proper tire pressure and adhering to scheduled maintenance will also help consistently achieve the best possible fuel economy. Check online forums to see what other CT4 drivers across all years are reporting for their real-world CT4 MPG.

How it compares

Compared to its competitors, the CT4’s fuel economy is in the middle of the pack. The BMW 330i xDrive, with its 2.0L turbocharged engine and all-wheel drive, achieves a slightly better 28 MPG combined. The Mercedes-Benz C300 4MATIC, also powered by a 2.0L turbo, manages a similar 27 MPG combined. The Audi A4 quattro, yet another 2.0L turbo competitor, returns around 27 MPG combined. However, models like the Genesis G70 2.5T AWD get around 20 MPG combined.

The CT4’s 2.7L engine, despite being a four-cylinder, is larger and more powerful than the base engines in many of its rivals, which explains the slightly lower MPG figures. It comes down to a trade-off; more power for less fuel efficiency. This is a conscious choice by the buyer when cross-shopping and considering all Cadillac fuel economy data.

Tips to maximize efficiency

Given this car’s strong turbocharged engine, resist the temptation to constantly use full throttle. Smooth and gradual acceleration will significantly improve fuel consumption, especially in city driving. The turbocharger adds excitement, but it also adds fuel usage when activated aggressively.

Take advantage of the CT4’s drive modes. The “Tour” or “Comfort” mode will optimize the engine and transmission settings for efficiency, softening throttle response and encouraging earlier upshifts. The more aggressive “Sport” mode should be limited to when performance is genuinely needed.

Ensure your tires are properly inflated. Underinflated tires create more rolling resistance, forcing the engine to work harder and reducing fuel economy. Check your tire pressure regularly and inflate them to the recommended level listed on the door jamb sticker.

Reduce unnecessary weight in the vehicle. The heavier the car, the more fuel it consumes. Remove any items you don’t need from the trunk and back seat, as every bit of unnecessary weight adds up over time and contributes to a small continuous efficiency loss.

Avoid idling for prolonged periods. If you anticipate being stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, and idling wastes fuel unnecessarily.