At 25 MPG combined, the 2016 Cadillac CT6 2.0L turbo is a compromise. It’s not a hybrid but it offers considerable space and comfort. The 2.0L engine allows the CT6 to achieve respectable fuel economy for its size. Buyers choosing this configuration sacrifice some of the power of the V6 options for better efficiency. They value the elegant interior and smooth ride that Cadillac delivers, and the 2.0L engine helps keep running costs reasonable for a large sedan.

City and highway performance

The EPA estimates for the 2016 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 engine’s efficiency is challenged by frequent acceleration and idling. However, the 30 MPG highway rating is impressive. It shows that the turbocharged 4-cylinder, paired with its eight-speed automatic transmission, can deliver respectable fuel economy when cruising at consistent speeds. The tall gearing of the transmission helps keep the engine revolutions low, maximizing efficiency on long drives. The CT6 2.0L shines on the highway, offering a comfortable and relatively frugal experience for those who spend considerable time on the open road.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2016 Cadillac CT6 2.0L is $1,750. This is based on driving 15,000 miles per year, with a mix of city and highway driving, and using the national average fuel price when calculated. Your actual fuel costs will vary based on driving habits, the type of roads you frequent, and the current price of gasoline in your area. The $1,750 estimate is a useful benchmark for comparing the CT6 2.0L’s running costs to other vehicles in its class, and a way to forecast your potential expenses.

Real-world expectations

While the EPA estimates provide a standardized benchmark, real-world fuel economy can vary significantly. Drivers with a heavy foot or those who primarily drive on congested city streets may see figures closer to the 22 MPG city rating, or even slightly below. Drivers who frequently embark on long highway journeys, maintain consistent speeds, and practice smooth acceleration techniques can realistically achieve or even exceed the 30 MPG highway estimate. Weather conditions, tire pressure, and even the use of accessories like air conditioning can also impact fuel consumption. It’s important to monitor your own fuel economy over time to get a true sense of what the CT6 2.0L delivers while driving. You can see real-world CT6 MPG across all years to get a better sense of what drivers are experiencing.

How it compares

In the full-size luxury sedan segment, the 2016 CT6 2.0L’s fuel economy positions it as a relatively efficient option. For example, the BMW 528i, another turbocharged 4-cylinder luxury sedan from that era, offered comparable fuel economy around 27 MPG combined. Opting for a larger engine, such as the V6 in the Acura TLX, typically results in lower fuel economy, around 25 MPG combined. Keep in mind that Acura models came standard with front-wheel-drive. The CT6 was rear-wheel-drive, a key differentiator for Cadillac customers.

The Lexus GS 350 typically achieved around 23 MPG combined. This comparison is important because buyers in this segment often weigh fuel economy alongside factors like performance, comfort, and brand prestige. Many potential CT6 buyers may also cross-shop with smaller Cadillac sedans. All Cadillac fuel economy data can help in that decision.

Tips to maximize efficiency

The CT6’s eight-speed automatic transmission is designed to optimize fuel economy, so allow it to shift smoothly and avoid aggressive acceleration. Rapid acceleration forces the transmission to downshift, increasing fuel consumption dramatically. Practice smooth and gradual acceleration to keep the engine operating in its most efficient range.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and reduces fuel economy. Check tire pressure regularly and inflate them to the manufacturer’s recommended pressure, found on a sticker inside the driver’s side doorjamb or in the owner’s manual.

Maintain a consistent speed on the highway. Using cruise control can help you maintain a steady speed, reducing unnecessary acceleration and braking. This is effective on long drives, where even small fluctuations in speed can impact fuel consumption.

Reduce unnecessary weight in the vehicle since the CT6 is one of the larger cars. Extra cargo in the trunk or backseat adds weight, requiring more energy to move the vehicle. Removing unnecessary items can improve fuel economy, especially on longer trips.

Consider using the CT6’s driving modes. Engaging “Tour” or fuel-saving modes will signal your preference for maximum economy and influence transmission shift points. Sport or performance modes will emphasize performance.