The 2025 Cadillac CT5 with all-wheel drive and the strong 3.0L V6 engine gets 21 MPG combined. It’s not aiming for Prius-like gas mileage. The CT5 3.0L AWD attracts drivers who want a good mix of performance, luxury, and all-weather driving, and who are okay with this fuel consumption for that experience.

City and highway performance

The EPA estimates 18 MPG in the city and 26 MPG on the highway for the 2025 Cadillac CT5 AWD 3.0L. The city number shows how responsive the engine is and the demands of stop-and-go traffic. The highway number, while not the best in its class, is respectable for this kind of vehicle, and should allow for comfortable long trips without too many gas stops. The 10-speed automatic transmission is important here, as it optimizes engine RPM for both acceleration and fuel efficiency. Cadillac buyers know about the tradeoffs when choosing a powerful V6 with AWD, and these fuel economy numbers are part of that consideration.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2025 Cadillac CT5 AWD 3.0L at $2,750. This is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs will vary depending on how you drive and local gas prices, but this figure gives you a standard way to compare the CT5 to other vehicles. This is an estimate based on EPA testing; your fuel expenses could be higher or lower.

Real-world expectations

The EPA provides standard tests, but real-world fuel economy is always different. Expect slightly lower MPG if you mostly drive in the city, especially in heavy traffic. However, you might reach or even beat the 26 MPG highway number if you drive carefully and keep a consistent speed. Accelerating hard or speeding up often will really hurt your fuel efficiency, so drive accordingly. The AWD system gives you better traction and stability, but it also uses more gas than a rear-wheel-drive model.

How it compares

The Cadillac CT5 AWD 3.0L is in a competitive class. The BMW 330i xDrive, with its 2.0L turbocharged four-cylinder, gets a combined fuel economy of 28 MPG, which is much better than the CT5, but it doesn’t have the V6’s power. The Audi A4 allroad, another AWD option, also gets better combined MPG, with a rating of 24 MPG with its 2.0L turbo four. The Genesis G70 3.3T AWD, with its more powerful twin-turbo V6, has similar fuel economy to the CT5, around 20 MPG combined. Considering all Cadillac fuel economy data, the CT5 3.0L is a performance choice that gives up some fuel efficiency for a more fun driving experience. Drivers wanting to save the most on gas should look at other cars; these buyers want the CT5’s smooth power and confident handling, even if it means paying a bit more for fuel. Reviewing the CT5 MPG across all years can also give potential buyers more information.

Tips to maximize efficiency

Avoid accelerating hard and braking hard. It’s tempting to floor the CT5’s powerful engine, but accelerating gently and watching traffic can really improve fuel economy. Smooth, consistent speeds are important, especially on the highway.

Check your tire pressure regularly. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure at least once a month and inflate them to the recommended level; you can usually find this information on a sticker inside the driver’s side doorjamb.

Don’t idle. Letting the engine idle for a long time wastes fuel. If you’re stopped for more than a minute, turn off the engine. The CT5’s climate control system will keep the temperature comfortable for a short time.

Take out extra weight. Remove any unnecessary items from the trunk or backseat, as extra weight makes the engine work harder, which lowers fuel economy. Removing every 100 pounds can slightly improve your MPG.

Sometimes it is better to not use cruise control. Cruise control keeps a consistent speed on flat roads, but it can be less efficient than a human driver on hills. The cruise control might downshift too much to maintain speed, which wastes fuel.