22 MPG combined for the 2022 Cadillac CT5 with the 3.0L twin-turbo V6 shows that there are trade-offs. This isn’t a Prius in disguise. It’s a quick, luxurious sedan that’s large, and that size affects fuel consumption. The typical CT5 3.0T buyer isn’t focused on maximum efficiency; they want a mix of performance, style, and Cadillac heritage. This mix means a fuel cost that these drivers usually accept.

City and highway performance

The EPA estimates for the CT5 3.0T show the difference between city and highway driving. City MPG is 19, because of stop-and-go traffic. The twin-turbo engine needs fuel to build boost and move from a stop. Highway driving gets a better 27 MPG. The 10-speed automatic transmission keeps the engine in its most efficient range when cruising. This highway number makes long road trips possible, but it won’t save as much gas as a hybrid or smaller turbocharged engine.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,650 for the 2022 Cadillac CT5 3.0L. This is based on driving 15,000 miles per year and using average fuel prices. Fuel costs will change based on driving habits, location, and gas prices. The EPA’s number is a standard for comparing the CT5’s fuel use to other vehicles. Knowing this cost lets buyers include fuel expenses in their budget when looking at a car in this segment. For other Cadillac models, all Cadillac fuel economy data is on this site.

Real-world expectations

EPA numbers are a guide, but real-world MPG can change. Hard acceleration, braking, and idling all hurt fuel economy. Drivers who want the CT5’s performance will likely see lower numbers than the EPA estimates. But those who drive conservatively and accelerate smoothly may get numbers closer to, or even above, the EPA estimates, especially on long highway trips. Tire pressure and temperature also matter.

How it compares

The CT5 3.0T’s fuel economy is in a range with its competitors. For example, the BMW M340i, another performance sedan, gets a combined 26 MPG with its turbocharged inline-six. The Audi S4, with its turbocharged V6, gets about 24 MPG combined. Even though both reach higher MPG, the lower cost of the CT5 is part of the compromise people accept. Looking at CT5 MPG across all years, the numbers are similar, so this isn’t new. Buying the CT5 3.0T often depends on things other than fuel efficiency, like styling, features, and brand preference. Buyers in this segment think about fuel costs, but it’s not the only factor.

Tips to maximize efficiency

The CT5’s 10-speed automatic transmission is programmed for performance and efficiency. Use “Tour” mode for daily driving. It upshifts sooner and has smoother throttle response to reduce fuel use. The transmission will still respond quickly when you accelerate, but the car will generally try to drive efficiently.

Check and keep proper tire pressure. Low tires increase rolling resistance, making the engine work harder and use more fuel. The recommended tire pressure is on a sticker inside the driver’s side door. A tire pressure gauge is an inexpensive tool for this.

Avoid idling. The CT5’s twin-turbo V6 uses fuel even when stopped. If you’ll be stopped for more than a minute, turn off the engine. Modern cars restart quickly, saving fuel.

Plan trips to reduce stop-and-go driving. Combining errands and avoiding traffic can improve fuel economy. The less accelerating and braking, the more efficient the trip.

Use cruise control on the highway to keep a steady speed. This reduces acceleration and deceleration, improving fuel economy. Watch traffic and adjust your speed for safety.