The 2021 Cadillac CT4-V with the 2.7L four-cylinder engine gets 23 MPG combined, which is acceptable but not amazing. This isn’t a Prius, and doesn’t try to be. The CT4-V 2.7L is for drivers who want performance and luxury in a compact package, and fuel economy is often less important than the driving experience for them. These buyers appreciate the responsive engine, sharp handling, and distinctive Cadillac styling, so they’re willing to compromise on gas mileage.

City and highway performance

The CT4-V’s EPA ratings are 20 MPG in the city and 29 MPG on the highway. The city number reflects the engine’s demands in stop-and-go traffic, where the turbocharger increases pressure frequently. The highway number shows the engine’s potential when cruising at a constant speed. The 29 MPG rating is achievable, but requires restraint, and sustained high speeds or aggressive acceleration will quickly reduce that number. The ten-speed automatic transmission tries to keep the engine in its sweet spot for both power and efficiency, but its responsiveness means it’s always ready to downshift for a burst of acceleration, which impacts fuel use.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2021 Cadillac CT4-V 2.7L will be $2,500. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway. It also assumes that the vehicle will be fueled using the national average fuel price. Individual fuel costs will vary depending on driving habits, location, and fuel prices.

Real-world expectations

While the EPA ratings provide a standardized benchmark, real-world fuel economy often changes. Expect to see figures that vary based on driving style and conditions. Drivers who accelerate quickly and those who drive primarily in congested urban environments might average closer to 18-19 MPG. Those who spend more time on the open road and drive conservatively could achieve or even slightly exceed the EPA’s 29 MPG highway rating. Consistent monitoring of your fuel consumption will give you the most accurate picture of what to expect.

How it compares

The CT4-V’s fuel economy is similar to other sporty compact sedans. For example, a 2021 BMW 330i, achieves a combined 28 MPG with its 2.0L turbocharged engine. A comparable Mercedes-Benz C300 comes in around 25 MPG combined. The Acura TLX with its base 2.0L turbo manages 25 MPG combined as well. The Cadillac’s 23 MPG is the lowest number in this comparison, but the CT4-V’s 2.7L engine offers more horsepower than the base engines in these other vehicles, delivering a different driving experience. Buyers who prioritize performance might be willing to sacrifice a few MPG for the added power, and can easily compare CT4 MPG across all years to determine which version suits their needs.

Tips to maximize efficiency

Avoid aggressive acceleration and hard braking, since the CT4-V’s turbocharged engine is sensitive to throttle inputs. Smooth, gradual acceleration will keep it from consuming excessive fuel. Anticipate traffic flow and maintain a steady speed whenever possible.

Pay attention to tire pressure. Underinflated tires increase rolling resistance, which can negatively impact fuel economy. Check your tire pressure regularly and maintain the recommended levels. This is important because it will prolong the life of your vehicle’s tires.

Minimize idling. Modern engines don’t need long warm-up periods, and excessive idling wastes fuel and contributes to emissions. Turn off the engine if you’re stopped for more than a minute or two.

Use cruise control on the highway, as maintaining a constant speed can help improve fuel efficiency on long highway drives. Be mindful of traffic conditions and adjust your speed accordingly.

Consider using the car’s various drive modes. Sport mode might be fun on the weekends, but selecting a more economical mode for daily commuting can make a noticeable difference over time. All of these data points can be compared to all Cadillac fuel economy data to see if the compromise is worth it for your driving style.