22 MPG combined isn’t going to win any hypermiling awards, but it’s the price you pay for the 2024 Cadillac CT5’s potent 3.0L twin-turbo V6. This isn’t a car bought by people prioritizing ultimate fuel efficiency. This is a car for drivers seeking performance and luxury, a uniquely American take on the sports sedan formula. They appreciate the responsive engine and composed handling, and are willing to accept a slightly lower MPG figure as part of the overall experience.

City and highway performance

The EPA estimates the 2024 Cadillac CT5 with the 3.0L V6 at 19 MPG in the city and 27 MPG on the highway. The urban figure reflects the engine’s tendency to consume more fuel during frequent stops and starts, while the highway rating showcases its ability to cruise efficiently at sustained speeds. The ten-speed automatic transmission plays a key role here, keeping the engine in its optimal power band while helping to reduce fuel consumption when possible. The CT5 isn’t meant to be driven gingerly, but even during spirited driving, the highway number should stay relatively close to the EPA estimate.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2024 Cadillac CT5 3.0L is $2,650. This figure is based on driving 15,000 miles per year and using national average fuel prices. Actual fuel costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. While the CT5 doesn’t require premium fuel, using it might yield slightly improved performance and fuel economy, though it’s unlikely to offset the higher cost. Consider your typical driving patterns and local fuel prices before assuming this number is accurate for your individual situation.

Real-world expectations

While EPA estimates provide a useful baseline, remember that real-world fuel economy often differs. Aggressive acceleration, heavy traffic, and extended idling can all negatively impact MPG. Cold weather can also reduce fuel efficiency, particularly on shorter trips when the engine hasn’t had a chance to fully warm up. The CT5’s turbocharged engine offers plenty of power on demand, but using that power frequently will certainly lower your average MPG. Drivers who prioritize smooth acceleration and maintain consistent speeds are more likely to achieve figures closer to the EPA estimates. See CT5 MPG across all years.

How it compares

The CT5 3.0L competes with other mid-size luxury sedans that also prioritize performance. The BMW M340i, for example, delivers a similar driving experience with an EPA-rated 26 MPG combined. The Audi S4 offers a slightly higher 24 MPG combined, while the Mercedes-AMG C43 lands closer to the CT5 with 22 MPG combined. These comparisons highlight the CT5’s slightly lower fuel efficiency compared to some of its rivals. The CT5 buyer willingly accepts this tradeoff, often citing the Caddy’s styling and value, along with its made-in-America appeal. For a broader view, explore all Cadillac fuel economy data.

Tips to maximize efficiency

Take advantage of the CT5’s drive modes. Selecting “Tour” mode will optimize the transmission and engine settings for fuel efficiency, softening throttle response and promoting earlier upshifts. Resisting the urge to constantly engage “Sport” mode will significantly improve your MPG.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressures regularly and inflate them to the recommended levels listed on the door jamb sticker. The correct pressure will not only improve your MPG, but also enhance tire longevity and handling.

Avoid unnecessary idling. Letting the engine idle for extended periods wastes fuel. If you anticipate being stopped for more than a minute, turn off the engine. Modern engines warm up quickly, so prolonged idling provides little benefit. Start-stop technology can also help automatically turn off the engine when stopped in traffic.

Lighten your load. Carrying unnecessary weight in the trunk or backseat reduces fuel economy. Remove any items that you don’t need, such as sports equipment or tools. A lighter vehicle requires less energy to accelerate and maintain speed, resulting in improved MPG. This is particularly true in city driving with frequent acceleration.

Plan your routes strategically. Avoid congested roads and traffic bottlenecks whenever possible. Driving on less congested routes, even if they are slightly longer, can often save you time and fuel. Use navigation apps to identify the most efficient routes that minimize stop-and-go traffic. Smooth and predictable driving is key to achieving optimal fuel economy in any vehicle, including the CT5.