21 MPG combined isn’t going to win any hypermiling awards, but it’s the price of admission for the 2021 Cadillac CT5-V AWD with the 3.0L twin-turbo V6. This isn’t a car purchased for its frugality; it’s chosen for its blend of performance, luxury, and confident all-weather handling. The CT5-V buyer prioritizes sharp acceleration, responsive steering, and a distinctive, slightly aggressive styling. They understand that a good amount of practicality will be sacrificed in pursuit of those desires. They buy the CT5-V for the experience, not the spreadsheet.

City and highway performance

The EPA estimates for the CT5-V AWD put it at 18 MPG in the city and 26 MPG on the highway. That city figure reflects the stop-and-go nature of urban driving, a scenario where the 3.0L V6 can quickly drink fuel as it overcomes the car’s weight with each acceleration. The highway number is more acceptable, as the 10-speed automatic transmission allows the engine to settle into a more efficient cruising RPM. The AWD system doesn’t help fuel economy, adding weight and drivetrain losses. This car rewards smooth, consistent driving, at least when you’re trying to stretch a gallon.

Annual fuel cost

The EPA calculates that the 2021 Cadillac CT5-V AWD 3.0L’s annual fuel cost will be approximately $2,750. This is based on driving 15,000 miles per year, using a national average fuel price. This $2,750 figure is just an estimate. Your actual fuel costs will vary depending on your driving habits, the type of driving you do (city vs. highway), and the price of gasoline in your area. Someone who primarily drives short distances in the city is likely to exceed that $2,750 figure significantly. Conversely, someone who mostly takes long highway trips might see a lower annual fuel bill. Premium fuel is recommended, further inflating that annual cost.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy for the CT5-V AWD is often a bit lower, particularly if you enjoy exploiting the engine’s performance. The twin-turbo V6 is responsive and sounds great, inviting drivers to dip into the throttle more frequently. Expect to see figures closer to the low 20s in mixed driving conditions, and potentially even lower if you frequently engage in spirited driving. The onboard trip computer will provide a more accurate reflection of your individual fuel consumption habits. The CT5 CT5 MPG across all years can fluctuate greatly.

How it compares

The CT5-V AWD isn’t alone in its segment. The BMW M340i xDrive, a direct competitor, boasts a slightly better EPA estimate of 26 MPG combined. Another rival, the Audi S4, manages 24 MPG combined. These seemingly small differences can add up over time. However, the Cadillac differentiates itself through its styling and unique driving dynamics. The CT5-V leans towards a more traditional American muscle car feel, while the German competitors often prioritize clinical precision. The Mercedes-AMG C43 4MATIC achieves around 22 MPG combined, which is comparable to the CT5-V, but at a higher price point. Buyers should compare all Cadillac fuel economy data when making purchasing considerations.

Tips to maximize efficiency

Smooth acceleration and braking are key to maximizing fuel economy in the CT5-V AWD. While the car encourages spirited driving, consciously avoiding excessive throttle inputs and hard braking can noticeably improve your MPG. The car’s weight and AWD system make it more sensitive to aggressive driving habits.

Ensure that your tires are properly inflated and aligned. Under-inflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Regular tire maintenance can have a measurable impact on fuel efficiency, even on a performance-oriented vehicle like the CT5-V.

Minimize idling time. Letting the engine run while stationary consumes fuel without covering any distance. If you anticipate being stopped for more than a minute or two, turn off the engine. The CT5-V features engine start/stop technology which does improve fuel economy, though some find it intrusive and disable it.

Use cruise control on the highway. Maintaining a consistent speed helps the engine operate more efficiently. Set the cruise control to a reasonable speed and let the car manage the throttle. This is particularly effective on long, relatively flat stretches of road.

Consider using a lighter touch with the driving mode selector. While “V-Mode” is tempting, and unlocks the car’s full performance potential, it also loosens the reins on fuel consumption. Reserve that exhilarating mode for special occasions, and stick with “Tour” or “Sport” for everyday driving if you’re concerned about MPG.