22 MPG combined is an average figure for the 2023 Cadillac CT5 with the 3.0L twin-turbo V6, and its buyers are likely aware. They aren’t prioritizing Prius-level efficiency; they’re after the distinct blend of American luxury, powerful acceleration, and sharp handling that this CT5 offers. Fuel costs are less important for those seeking its unique performance.

City and highway performance

The EPA estimates for the 2023 CT5 3.0L reflect the engine’s performance. The 19 MPG city figure shows that stop-and-go driving will reduce efficiency, especially with the engine’s strong power. The 27 MPG highway rating is better, suggesting decent efficiency during long drives. However, high-speed driving, especially when pushing the engine, will likely result in numbers closer to the city estimate.

Annual fuel cost

The EPA calculates that the 2023 Cadillac CT5 3.0L will cost about $2,650 per year to fuel, based on driving 15,000 miles annually and using national average fuel prices. This is a standard figure for comparison and assumes an even mix of city and highway driving. Individual fuel costs will vary depending on driving habits, local fuel prices, and the type of fuel used, premium is recommended for the best performance.

Real-world expectations

The EPA provides a standard, but real-world fuel economy for the 2023 CT5 3.0L depends on driver behavior. Someone who enjoys the engine’s strong power and often explores its upper rev range will likely see their MPG consistently below the EPA estimates. However, a driver with a lighter foot who prioritizes smooth acceleration might achieve figures closer to, or even slightly exceeding, the stated numbers, especially on longer highway trips. The vehicle’s weight and that responsive 10-speed automatic transmission will downshift quickly when needed to deliver power, which in turn uses more fuel. It is wise to get a sense of CT5 MPG across all years to see trends in real-world performance before buying.

How it compares

Compared to competitors, the CT5 3.0L’s fuel economy is similar to other performance sedans. For example, the BMW M340i, with its 3.0L inline-six, achieves an EPA-estimated 26 MPG combined, slightly better than the CT5. The Mercedes-AMG C43, with its forced-induction four-cylinder, manages around 21 MPG combined. The Audi S4, with its V6, typically achieves around 24 MPG combined. The CT5’s main selling point is the luxury with sporty performance. Drivers who don’t prioritize maximum fuel efficiency will likely appreciate the CT5 for its American character and acceleration. For a broader perspective, compare all Cadillac fuel economy data.

Tips to maximize efficiency

The CT5 3.0L isn’t designed for hypermiling, but owners can take steps to improve their fuel economy. Avoid aggressive acceleration and hard braking. The twin-turbo V6 delivers plenty of power smoothly, so gradually building speed reduces unnecessary fuel consumption.

Keep tires properly inflated according to the manufacturer’s specifications, which can be found on a sticker inside the driver’s side door. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Use the factory-recommended premium fuel grade; it is designed to optimize combustion and deliver peak efficiency and performance.

Minimize idling. Modern engines consume fuel even when stationary, especially when cold. If you expect to wait for more than a minute, turn off the engine. This applies to running errands or waiting in long lines. Reduce aerodynamic drag by removing any unnecessary roof racks or cargo carriers when they’re not in use to increase fuel efficiency.

Use cruise control on long highway stretches to maintain a consistent speed and reduce unnecessary throttle adjustments. However, be mindful of terrain changes and anticipate hills to avoid excessive downshifting. Plan your trips and combine errands to minimize cold starts, as engines are less efficient before reaching their optimal operating temperature.