The 2024 Cadillac CT4 AWD with the high-output 2.7L turbocharged four-cylinder gets 24 MPG combined. While important, that number likely isn’t the main concern for the typical buyer of this car: someone who wants a compact size, Cadillac luxury, and surprisingly strong power from its unusual engine. Fuel efficiency is a consideration, but not the main reason for buying it.

City and highway performance

The EPA estimates the CT4 AWD 2.7L at 21 MPG in the city and 29 MPG on the highway. This small difference between city and highway MPG suggests this engine is flexible and efficient across different driving conditions, due to its advanced turbocharging system and smooth-shifting 10-speed automatic transmission. Drivers in urban areas won’t see a big drop in fuel economy compared to highway driving, which can happen with less advanced engines.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Cadillac CT4 AWD 2.7L at $2,400. This is based on driving 15,000 miles per year and using the national average gasoline price at the time of calculation. Your real fuel costs may be higher or lower depending on how you drive, the fuel you buy, and fuel prices in your area. $2,400 is a standard way to compare the CT4’s costs to other cars in its class. To see all Cadillac fuel economy data, browse Cadillac’s MPG figures.

Real-world expectations

EPA estimates provide a useful baseline, but real-world fuel economy often changes. Aggressive driving, short trips, and long idling can all lower fuel efficiency, but smooth acceleration, consistent highway speeds, and good maintenance can help you reach or go beyond the EPA estimates. Owners who regularly get the published numbers likely use premium fuel as recommended (but not required) and maintain their car well.

How it compares

The CT4’s fuel economy sits in a specific place among its rivals. The BMW 330i xDrive, another popular compact luxury sedan with all-wheel drive, is rated at 28 MPG combined, so it may save you more on gas. The Mercedes-Benz C300 4MATIC gets around 26 MPG combined, making it a similar competitor. However, the CT4 with the 2.7L offers a very different driving experience, with a torque curve that feels more muscular and immediate. Most CT4 buyers are willing to make that tradeoff. To see CT4 MPG across all years, check out CT4 fuel efficiency data.

Tips to maximize efficiency

Take advantage of the CT4’s driving modes. Sport mode is tempting for fast driving, but the normal drive mode balances performance and efficiency best for everyday driving, because it optimizes throttle response and shift patterns to save fuel.

Make sure your tires have the right amount of air. Underinflated tires increase rolling resistance, which lowers fuel economy. Check your tire pressure often and fill them to the recommended levels, which you can find on the sticker on the driver’s side door.

Don’t idle for too long. Modern engines like the CT4’s are efficient, even at startup. Idling for more than a minute or two wastes fuel, so turn off the engine if you’ll be waiting a while.

Service your CT4 on schedule. Regular oil changes, air filter replacements, and spark plug maintenance all help fuel efficiency. A well-maintained engine runs better.

Remove extra weight from your car. Extra cargo in the trunk or passenger area adds weight and uses more fuel, even if slightly. Only carry what you need.