The 2020 Cadillac CT5 gets 21 MPG combined when equipped with all-wheel drive and the 3.0L twin-turbo V6. This figure reflects the car’s aim to deliver performance, luxury, and all-weather capability, which affects fuel consumption. This isn’t a hybrid; it’s a Cadillac engineered for a satisfying driving experience, and that shapes its MPG.

City and highway performance

The EPA estimates the CT5 AWD 3.0L V6 achieves 18 MPG in the city and 25 MPG on the highway. These numbers reflect the engine’s strong power and the all-wheel-drive system’s contribution to increased weight and drivetrain loss. City driving, with its frequent stops and starts, increases fuel use as the engine works harder. The highway figure is better, benefiting from consistent speeds and the engine operating more efficiently. Aggressive driving and frequent acceleration will reduce both city and highway figures significantly. This car does not reward a heavy foot, even though it performs well. Refinement and smooth power are important here.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Cadillac CT5 AWD 3.0L V6 at $2,750. This is based on driving 15,000 miles per year and average fuel prices. This number is an estimate, the precise cost will depend on fuel prices during the year, and the cost of premium gasoline the car requires. If you drive fewer miles, such as 8,000 miles per year, these figures will be lower.

Real-world expectations

The EPA provides standardized testing data, but real-world fuel economy varies due to driving habits, traffic, and weather. CT5 drivers who accelerate quickly and often engage the engine’s full potential will likely see MPG below the EPA estimates. Drivers with a more conservative style, who anticipate traffic and minimize hard acceleration, may achieve figures closer to, or slightly above, the official numbers. Terrain also influences fuel use as hilly areas will increase fuel demand, while flat terrain allows for more efficient cruising. Using accessories like air conditioning can also impact overall MPG; how you drive matters, and anticipating the road ahead will save fuel.

How it compares

In the compact luxury sedan segment, the CT5’s fuel economy is mid-pack. The BMW 330i xDrive, with a four-cylinder engine, gets a combined 28 MPG, making it more efficient. The Mercedes-Benz C300 4MATIC gets a combined 26 MPG with its four-cylinder engine. However, neither offers the same horsepower as the CT5’s V6. Audi’s A4 allroad, a wagon, offers all-wheel drive and achieves 24 MPG combined. Drivers who want better fuel economy should explore all Cadillac fuel economy data, considering the CT5 with the 2.0L turbo engine offers better MPG. A buyer drawn to the CT5 AWD 3.0L V6 may accept a tradeoff for the enhanced performance, so it is important to review CT5 MPG across all years to see if another trim or year is worth considering.

Tips to maximize efficiency

Smooth acceleration is key to maximizing fuel economy in the CT5 3.0L. Avoid abrupt starts and stops, and maintain a consistent speed, especially on the highway. The twin-turbo V6 delivers strong torque at low RPM, so you don’t need to push the throttle hard. Gradual throttle inputs will keep the engine efficient.

Regular maintenance, including tire inflation and oil changes, is important for fuel economy. Underinflated tires increase rolling resistance which reduces your MPG, while old motor oil thickens and strains the engine, which also reduces MPG. Following the manufacturer’s maintenance schedule ensures the engine and drivetrain are working efficiently.

Reduce weight in the car. Excess cargo in the trunk or heavy items on the roof increase the vehicle’s mass, requiring more energy to accelerate. Remove roof racks when not using them, because they increase aerodynamic drag at higher speeds reducing MPG.

When possible, use cruise control on the highway. Cruise control maintains a consistent speed, minimizing throttle variations optimizing fuel use. Watch out for terrain and traffic and disengage cruise control when necessary to stay safe.