The 2025 Cadillac CT5 with the 3.0L twin-turbo V6 gets 22 MPG combined. This isn’t a hybrid and doesn’t try to be. It’s a genuine performance sedan, prioritizing potent acceleration and a rewarding driving experience over maximum fuel efficiency. Buyers want a stylish, comfortable, and quick luxury sedan, accepting middling MPG to get it.

City and highway performance

The EPA estimates the CT5 3.0L V6 achieves 19 MPG in the city and 28 MPG on the highway. The city figure reflects stop-and-go traffic, where the engine spends more time idling or accelerating. The highway number is more respectable, showcasing the benefits of the 10-speed automatic transmission (S10) which allows the engine to cruise at lower RPMs. The difference between city and highway figures highlights how driving style significantly impacts fuel consumption in the CT5. Aggressive driving on the highway will drop that 28 MPG figure, while a gentle touch in the city could yield slightly better results. For further insight, check out CT5 MPG across all years.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2025 Cadillac CT5 3.0L V6 at $2,650. This is based on driving 15,000 miles per year and using national average fuel prices. This is an estimate, and your actual fuel costs may vary depending on your driving habits, the type of fuel you use (premium is recommended for optimal performance), and regional fuel prices. This number is helpful for budgeting and comparing the CT5 to other vehicles but shouldn’t be considered an exact prediction.

Real-world expectations

The EPA provides a standardized test, but real-world fuel economy often differs. CT5 3.0L owners report mileage figures close to the EPA estimates, but experiences vary. Drivers with a “lead foot” or those who frequently engage the engine’s reliable power can expect lower MPG, potentially dipping into the mid-teens in city driving. Those who prioritize smooth acceleration and consistent highway speeds may see numbers slightly exceeding the EPA’s 28 MPG. Driving style and conditions heavily influence the CT5’s fuel efficiency.

How it compares

The CT5’s fuel economy places it in a competitive set, though it’s not a leader. The BMW 340i, for example, achieves a combined 26 MPG with its similar inline-six engine, a noticeable advantage. The Audi S4, another comparable performance sedan, manages 24 MPG combined. Those who still need a sports sedan, but would like to consider something more fuel efficient, should look at the Acura TLX, which comes in at 24 MPG combined. The CT5’s 22 MPG combined figure reflects its positioning a blend of performance and luxury that doesn’t prioritize ultimate fuel efficiency. The V6 engine keeps this vehicle from reaching the fuel economy offered by others, and while the four-cylinder options may offer better gas mileage, performance is sacrificed. For those interested in the brand’s wider range, see all Cadillac fuel economy data. A CT5 owner accepts the slightly lower fuel economy for the power and driving dynamics the 3.0L V6 engine provides.

Tips to maximize efficiency

Consistent maintenance is important for maintaining optimal fuel efficiency in the CT5. Make sure the engine is properly tuned, the tires are correctly inflated, and the air filter is clean. Regular servicing prevents the engine from working harder than necessary, minimizing fuel consumption.

Anticipate traffic flow and avoid sudden acceleration and braking. The CT5’s engine responds powerfully to aggressive throttle inputs, but this translates to higher fuel consumption. Smooth, gradual acceleration and proactive braking help conserve fuel.

Minimize idling time. If you’re stopped for more than a minute or two, consider turning off the engine. Idling consumes fuel without providing any forward motion.

Use cruise control on the highway to maintain a consistent speed and optimize fuel efficiency. Cruise control helps prevent unintentional fluctuations in speed, leading to more efficient fuel consumption on long drives.

Consider using the CT5’s various drive modes to optimize fuel efficiency. The “Tour” or “Eco” modes typically prioritize fuel economy by adjusting throttle response and transmission shift points. Experimenting with these modes can improve your MPG without sacrificing too much driving enjoyment.