24 MPG combined is a compromise for the 2023 Cadillac CT4 AWD with the 2.7L turbocharged engine. This isn’t a fuel-sipping commuter car; it’s a compact luxury sedan designed to deliver an engaging driving experience, and that experience costs money at the pump. The target buyer for this CT4 values responsive acceleration and confident all-weather traction over fuel efficiency. They’re willing to trade some MPGs for a more engaging driving experience, one that’s distinct from the weaker base engine options.

City and highway performance

The EPA estimates a city MPG of 21 and a highway MPG of 29 for this specific CT4 configuration. The city number reflects the engine’s need to work harder in stop-and-go traffic, where the turbocharger’s benefits are diminished. The highway figure, while better, still isn’t great compared to some competitors, largely because this 2.7L 4-cylinder is tuned for strong power delivery across the rev range, not solely for maximizing efficiency at a constant cruising speed. The ten-speed automatic transmission helps keep the engine in its optimal power band, but its focus is more on performance than on squeezing every last drop of fuel. This is true if the driver frequently calls upon the engine’s generous torque for passing or merging. The AWD system provides added security and handling prowess, but it also contributes to a slight penalty in fuel economy compared to a rear-wheel-drive version.

Annual fuel cost

The EPA estimates that owners of the 2023 Cadillac CT4 AWD 2.7L will spend $2,400 on fuel annually. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, and assumes the national average fuel price. Of course, this is just an estimate. Your actual fuel costs may be higher or lower depending on your driving habits, the type of fuel you use (premium fuel is recommended for optimal performance), and fluctuating gas prices. Consider this number a benchmark for comparison against other vehicles, and a reminder that the CT4’s performance comes with a tangible cost.

Real-world expectations

While the EPA estimates provide a good baseline, real-world MPG can vary significantly. Drivers who frequently drive hard, live in congested areas with prolonged idling, or often carry passengers and cargo are likely to see figures closer to the lower end of the EPA range, or even slightly below. Conversely, drivers who primarily use the CT4 for highway cruising and drive gently might be able to achieve MPG figures closer to, or even slightly exceeding, the EPA highway estimate. The key is to drive responsibly and be mindful of your driving habits if you want to stay within the EPA’s projected fuel consumption.

How it compares

Compared to its competitors, the 2023 Cadillac CT4 AWD 2.7L’s fuel economy places it as a mid-pack performer. The BMW 330i xDrive, for instance, achieves an EPA combined MPG of 28, a noticeable improvement. The Mercedes-Benz C300 4MATIC is similarly more efficient, with a combined MPG of around 27. Even the Audi A4 quattro manages a slightly better combined MPG of 26. However, these competitors often achieve these figures with less powerful engine tunes or more conservative driving dynamics. The Acura Integra, while not directly comparable in terms of luxury appointment, significantly outpaces the CT4 with its turbocharged engine, delivering a combined MPG of 30 in its A-Spec trim. Buyers considering the CT4 are often willing to overlook this disadvantage in fuel economy because they prioritize Cadillac’s distinct styling, luxurious interior, and the unique character of its turbocharged engine. See CT4 MPG data across all years, or consult all Cadillac fuel economy data.

Tips to maximize efficiency

Avoid aggressive acceleration, especially from a standstill. The CT4’s turbocharged engine is responsive, but each surge of power uses more fuel. Gradual acceleration, particularly in city driving, can significantly improve your MPG. Anticipate traffic flow and maintain a steady speed to avoid unnecessary braking and acceleration.

Proper tire inflation is important for optimal fuel economy. Check your tire pressure regularly and inflate them to the recommended levels, which are typically found on a sticker inside the driver’s side doorjamb. Under-inflated tires create more rolling resistance, which reduces fuel efficiency.

Minimize idling. Letting the CT4 idle for extended periods wastes fuel. If you’re stopped for more than a minute, turn off the engine. Modern cars like the CT4 are designed to restart quickly and reliably, so there’s no need to keep the engine running unnecessarily. This is especially important in urban stop-and-go conditions.

Use cruise control on the highway whenever possible. Cruise control helps maintain a consistent speed, which can improve fuel economy on long trips. Watch road conditions and disengage cruise control when necessary, such as in heavy traffic or on hilly terrain.