25 MPG combined is a respectable figure for a large luxury sedan like the 2018 Cadillac CT6 with the 2.0L turbo. It’s not going to win any hypermiling competitions, nor should it. This CT6 variant caters to a buyer who wants a smooth ride, spacious interior, and recognizable Cadillac prestige, plus lower fuel costs compared to the thirstier V6 and V8 options. They appreciate the efficiency, but performance and comfort are still important.

City and highway performance

The EPA estimates for the 2018 CT6 2.0L are 22 MPG in the city and 30 MPG on the highway. The city figure reflects stop-and-go traffic, where the smaller engine has to work harder to move the car’s weight. The highway number demonstrates the benefits of the eight-speed automatic transmission, allowing the engine to cruise at lower RPMs, maximizing fuel efficiency. Achieving that 30 MPG will require a disciplined right foot, as aggressive acceleration quickly diminishes fuel economy.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Cadillac CT6 2.0L is $2,300. This calculation is based on driving 15,000 miles per year and assumes national average fuel prices. Individual results will vary depending on driving habits, fuel prices in your area, and the type of driving you do. However, the $2,300 figure provides a useful benchmark for budgeting and comparing the CT6’s running costs against other vehicles. Drivers who primarily stick to city driving are likely to spend more, close to $3,000 per year, while predominantly highway drivers can likely keep it closer to the $2,000 mark.

Real-world expectations

EPA estimates provide a standardized baseline, but real-world fuel economy can fluctuate. Owners report figures that generally align with the EPA’s estimates, but variations do occur. Factors such as driving style, tire pressure, and even the use of air conditioning can impact fuel consumption. A heavy foot on the accelerator, frequent hard braking, and neglecting regular maintenance can all contribute to lower MPG. Smooth driving, consistent speeds, and diligent upkeep can help you achieve or even slightly exceed the EPA numbers. Checking CT6 MPG across all years can help with understanding trends.

How it compares

The 2018 Cadillac CT6 2.0L is interestingly positioned in the full-size luxury sedan market. Compared to its own stablemates, the V6 and V8 versions obviously use more fuel. Looking at competitors, a comparable Mercedes-Benz E300 generally achieves around 24 MPG combined, slightly below the CT6’s rating, despite its technology.

The BMW 530i, another popular choice, offers a similar level of performance and fuel economy, typically hovering around 27 MPG combined. This difference, despite seeming small on paper, can translate into real savings over the lifespan of the vehicle. The Lexus GS 300, focused on reliability and luxury, returns roughly 24 MPG combined as well.

The buyer considering the CT6 2.0L is often cross-shopping these models, and the Cadillac’s slight edge in fuel economy, combined with its spaciousness and distinctive styling, can be a deciding factor. Browsing all Cadillac fuel economy data can broaden the search.

Tips to maximize efficiency

Maintaining proper tire inflation is for optimal fuel economy. Check your tire pressure regularly and adhere to the recommended PSI listed on the driver’s side doorjamb. Underinflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel.

Avoid aggressive driving habits. Rapid acceleration, hard braking, and high speeds significantly decrease fuel efficiency. Anticipate traffic flow and maintain a smooth, steady pace. Gradual acceleration and gentle braking are key to maximizing MPG.

Minimize idling time. If you anticipate being stopped for more than a minute, turn off the engine. Idling consumes fuel without covering any distance. Modern engines are designed to restart quickly and efficiently, so there’s no need to leave the engine running unnecessarily.

Service your vehicle regularly. A well-maintained engine runs more efficiently. Follow the manufacturer’s recommended maintenance schedule, including oil changes, air filter replacements, and spark plug maintenance. These tasks can have a noticeable impact on fuel economy.