The 2021 Cadillac CT5 V with the 3.0L V6 gets 21 MPG combined. This isn’t going to win any awards for less gas, but the fuel economy directly reflects the car’s mission: a blend of performance and luxury in a rear- or all-wheel-drive car. This isn’t a fuel-sipping hybrid; it’s a statement for drivers who prioritize sharp handling, distinctive styling, and a potent engine note. They accept the fuel economy penalty as the price of entry for this level of driving engagement. The CT5 V isn’t trying to be all things to all people.

City and highway performance

The EPA estimates the 2021 Cadillac CT5 V 3.0L achieves 18 MPG in the city and 27 MPG on the highway. The highway figure is respectable for a car with this level of performance, making comfortable highway cruising a viable option. The city MPG reflects the reality of stop-and-go traffic and a powertrain tuned for responsiveness.

The turbocharged V6 encourages spirited acceleration, and that translates to reduced fuel efficiency around town. Drivers who spend most of their time in city environments should carefully consider whether the CT5 V’s performance credentials outweigh the relatively thirsty city consumption. Learn more about CT5 MPG across all years.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Cadillac CT5 V 3.0L at $2,750. This figure is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that this is an estimate; individual driving habits play a major role, and fuel prices can fluctuate significantly depending on location.

If you drive aggressively or consistently use premium fuel (which is recommended for optimal performance), your actual fuel costs could easily exceed the EPA estimate. Conversely, if you prioritize fuel-efficient driving techniques, you might come in under that $2,750 figure.

Real-world expectations

While the EPA figures provide a useful baseline, real-world fuel economy often varies. Some drivers report seeing figures ranging from slightly below the EPA’s 18 MPG city rating to a bit above the 27 MPG highway rating, depending on their driving style and conditions.

A driver who enjoys exploring the engine’s power band frequently will likely see numbers closer to the lower end of the range. Conversely, a driver who focuses on smooth acceleration and consistent speeds on the highway might achieve figures closer to, or even slightly exceeding, the EPA’s estimates. Remember that outside temperature, tire pressure, and overall vehicle maintenance affect the fuel economy, too.

How it compares

The 2021 Cadillac CT5 V competes in a crowded segment with some formidable rivals. A BMW M340i xDrive, with its turbocharged inline-six, achieves a combined MPG of 25, presenting a measurable advantage in fuel efficiency. An Audi S4, also boasting a turbocharged V6, is rated at 24 MPG combined, and even the Mercedes-AMG C43 sedan manages 22 MPG combined.

These rivals deliver similar levels of performance with a slightly more palatable fuel bill. For a Cadillac buyer though, efficiency is often a secondary consideration to styling, American heritage, and distinctive driving feel. However, for those who spend many hours behind the wheel, the extra visits to the pump could become a factor that tilts them towards one of its German competitors. Compare all Cadillac fuel economy data before making a decision.

Tips to maximize efficiency

Pay attention to tire pressure. Ensuring your tires are properly inflated minimizes rolling resistance, leading to improved fuel economy. Check your tire pressure regularly, especially before long trips, and adhere to the pressure specifications listed on the driver’s side door jamb. This simple act can subtly but consistently improve your CT5 V’s efficiency.

Avoid aggressive acceleration and braking. The CT5 V’s powerful engine encourages spirited driving, but these habits negatively affect fuel consumption. Accelerate smoothly and gradually, and anticipate stops to minimize hard braking. Maintaining a steady speed, especially on the highway, is important for maximizing fuel efficiency.

Use the car’s drive modes wisely. The CT5 V typically offers different drive modes that optimize various aspects of the vehicle’s performance, including fuel economy. Using the “Tour” or “Eco” mode, if available, can help prioritize fuel efficiency by adjusting throttle response and transmission shift points. Experiment with the different modes to see which best suits your driving style and delivers the best possible fuel economy.

Minimize idling. Leaving the engine running while stationary consumes fuel without covering any distance. If you anticipate being stopped for more than a minute or two, consider turning off the engine. Modern cars are designed to restart quickly and easily, minimizing any inconvenience. This is especially relevant in urban driving conditions.