The 2023 Cadillac CT5 with all-wheel drive and the strong 3.0L twin-turbo V6 gets 21 MPG combined. While not stellar, it’s a trade-off accepted by buyers who want performance and refinement instead of focusing on efficiency in a luxury sport sedan. This isn’t a car for hypermilers. It’s for those who value a responsive engine, composed handling, and American luxury.

City and highway performance

The EPA estimates the CT5 AWD 3.0L V6 achieves 18 MPG in the city and 26 MPG on the highway. The city figure reflects the engine’s tendency to consume more fuel during stop-and-go driving, an effect that’s made worse by the all-wheel-drive system. The highway number is more respectable. It highlights the benefits of the ten-speed automatic transmission which helps optimize fuel consumption at cruising speeds. Drivers can expect the highway MPG to change based on driving style. Aggressive acceleration and high speeds will quickly diminish that 26 MPG figure. The significant spread between city and highway numbers shows the importance of driving habits when figuring out fuel costs.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Cadillac CT5 AWD 3.0L V6 to be $2,750. This number is calculated based on driving 15,000 miles per year and using the national average fuel price. Remember that local fuel prices can vary significantly, so your actual fuel cost may be higher or lower depending on where you live and current gas prices. Factors such as driving style, tire pressure, and vehicle maintenance also affect your real-world fuel expenses.

Real-world expectations

While the EPA provides a standard estimate, real-world fuel economy can change considerably. Owners of the CT5 with this engine often report numbers close to the EPA estimates, but achieving them requires conscious effort. Aggressive driving will quickly drop the MPG into the high teens, while a more conservative approach might give slightly better results. Factors like traffic congestion, weather conditions, and the frequency of short trips also affect fuel economy. Don’t expect hybrid-like efficiency. This is a performance-oriented engine in a relatively heavy sedan.

How it compares

When looking at competitors, the CT5’s fuel economy is in a specific range for the segment. The BMW M340i xDrive, with its turbocharged inline-six and all-wheel drive, achieves an EPA-estimated 25 MPG combined. The Audi S4, another popular choice, is around 24 MPG combined. The Mercedes-Benz C43 AMG, before its 2023 redesign, managed around 22 MPG combined. These small differences are important for buyers seeking performance, but also mindful of fuel expenses. For example, someone cross-shopping the CT5 against a Lexus IS 350 AWD (22 MPG combined) might want the Cadillac’s more powerful twin-turbo engine, accepting slightly lower fuel efficiency. For all Cadillac fuel economy data, review relevant resources. You can explore CT5 MPG across all years, too.

Tips to maximize efficiency

Take advantage of the CT5’s selectable drive modes. Select “Tour” mode for everyday driving to prioritize fuel efficiency. This mode adjusts throttle response and transmission behavior to optimize MPG. Don’t use “Sport” or other performance-oriented modes unless you need the extra power.

Regular maintenance is critical for optimal fuel economy. Make sure your tires are properly inflated and that your engine air filter is clean. A dirty air filter restricts airflow, forcing the engine to work harder and use more fuel. Schedule regular tune-ups and oil changes to keep the engine running smoothly.

Reduce unnecessary weight in the vehicle. Extra cargo adds to the vehicle’s overall weight, which reduces fuel economy. Remove any items you don’t need, particularly heavy objects. Even small weight reductions can help improve MPG over time.

Anticipate traffic flow to avoid abrupt acceleration and braking. Smooth and consistent driving habits significantly improve fuel economy. Maintain a safe following distance and avoid speeding. Using cruise control on the highway can also help maintain a consistent speed and optimize fuel consumption.

Reduce idling time when possible. Idling consumes fuel without covering any distance. If you expect to be stopped for more than a minute or two, turn off the engine. Restarting the engine consumes less fuel than letting it idle for a long time.