20 MPG combined isn’t going to win any hypermiling contests, but it’s the reality you accept when you choose the 2020 Cadillac CT5 V AWD with the 3.0L twin-turbo V6. This isn’t a car bought by penny-pinchers obsessed with maximizing fuel efficiency; it’s a performance-oriented sedan designed for drivers who prioritize power, engaging handling, and a touch of American swagger. They tolerate the middling MPG because they want the responsiveness and confident all-weather grip that comes with this specific configuration.

City and highway performance

The EPA estimates the CT5 V AWD at 17 MPG in the city and 25 MPG on the highway. The city number reflects the engine’s need to work harder during stop-and-go traffic, and the turbochargers certainly contribute to fuel consumption during acceleration. The highway figure is more respectable, hinting at better efficiency when the engine settles into a steady cruise. However, important to remember is that aggressive driving, which this car encourages, will drastically reduce these numbers. The smooth-shifting 10-speed automatic transmission makes the most of the engine’s powerband, but it can’t completely overcome the inherent thirst of a boosted V6 in a car that weighs over 4,000 pounds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Cadillac CT5 V AWD at $2,900. This calculation is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that premium fuel is recommended, adding to the overall expense. This number should be considered a baseline, as actual fuel costs will vary depending on individual driving habits, local fuel prices, and the type of driving (city versus highway) that predominates.

Real-world expectations

Don’t expect to consistently achieve the EPA’s combined MPG of 20. In real-world driving, especially with a lead foot, numbers closer to 17-18 MPG are far more likely. Highway driving can yield results in the low 20s, but only with conscious effort to maintain a steady speed and avoid frequent acceleration. The CT5 V AWD rewards aggressive driving, and resisting the urge to tap into that readily available power will be a constant battle. This isn’t a car designed for long-distance, fuel-sipping road trips; it’s designed for spirited everyday driving.

How it compares

Compared to its competitors, the CT5 V AWD’s fuel economy is competitive. The BMW M340i xDrive, another all-wheel-drive performance sedan, achieves a slightly better 25 MPG combined. The Mercedes-AMG C43 Sedan 4MATIC, while packing even more horsepower, lands at a similar 22 MPG combined. The Audi S4, with its turbocharged V6 and quattro all-wheel drive, claims 24 MPG combined. So, while the CT5 V AWD isn’t the most efficient in its class, it’s also not the least. Buyers in this segment understand they’re sacrificing some fuel economy for performance, and the differences are often marginal. For those seeking better efficiency from Cadillac, all Cadillac fuel economy data is readily available. And if you’re curious about other years of this model, go deeper into CT5 MPG across all years.

Tips to maximize efficiency

Take advantage of the CT5 V’s selectable drive modes. “Tour” mode prioritizes fuel efficiency by optimizing throttle response and shift points. It won’t transform the CT5 V into a Prius, but it can make a noticeable difference in everyday driving, particularly in stop-and-go traffic where aggressive acceleration is less necessary.

Monitor your tire pressure regularly. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Maintaining the recommended tire pressure not only improves fuel economy but also enhances handling and prolongs tire life.

Avoid unnecessary idling. Modern engines are designed to be efficient, and restarting them consumes less fuel than idling for extended periods. If you’re stopped for more than a minute, turn off the engine to conserve fuel.

Be mindful of your driving habits. Sudden acceleration and hard braking are major fuel economy killers. Smooth, gradual acceleration and anticipating traffic flow help minimize fuel consumption and maximize efficiency. Practice relaxed driving, especially on the highway.

Consider removing unnecessary weight. Carrying extra cargo increases the vehicle’s load, forcing the engine to work harder and reduces fuel economy. Remove any items from the trunk or back seat that aren’t essential for your daily travels.