21 MPG combined probably isn’t the main reason someone buys a 2020 Cadillac CT5 V with the 3.0L twin-turbo V6. This is a car for enthusiasts who want both luxury and performance. While they probably consider fuel costs, it’s likely less important than the responsiveness of the ten-speed automatic or the assured grip of the chassis. This CT5 V is about the driving experience, a modern take on the classic American sport sedan, and that character means slightly lower fuel efficiency.

City and highway performance

The EPA estimates 18 MPG in the city and 26 MPG on the highway for this CT5 V. The city figure reflects the demands on the engine in stop-and-go traffic, where the turbochargers are constantly working. The highway number shows more efficient cruising, where the ten-speed transmission can settle into its taller gears, letting the engine run at lower RPMs. The difference between city and highway driving shows that heavy acceleration impacts gas mileage.

Annual Fuel Cost

The EPA calculates that the annual fuel cost for the 2020 Cadillac CT5 V 3.0L will be about $2,750. 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 at the time of calculation. This is an estimate, and your actual fuel costs may change based on your driving, the fuel you use, and changes in gas prices. The EPA rating must use the manufacturer’s recommended fuel, but premium may improve performance. The EPA assumes regular unleaded to provide a fair comparison.

Real-World Expectations

CT5 V owners often report numbers close to the EPA estimates, but some get slightly lower MPG in real-world driving. This depends on driving style. Frequent acceleration and aggressive driving will quickly lower the observed MPG. However, those who prioritize smooth acceleration and consistent speeds can often meet or slightly exceed the EPA highway figure. Real-world numbers will be affected by weather, terrain, and tire conditions. See the EPA Fuel Economy guide for information about how the numbers are tested.

How It Compares

Compared to its rivals, the 2020 Cadillac CT5 V’s fuel economy is within the expected range for a performance sedan with a similar powertrain. For example, the BMW M340i gets around 25 MPG combined with its inline-six turbo engine. The Audi S4, with a turbocharged V6, posts similar numbers, around 24 MPG combined. Even the Genesis G70 3.3T offers around 20 MPG combined. The difference may seem small, but buyers should consider all factors. You can browse CT5 MPG across all years to see if other engine options better suit your needs and driving style, or view all Cadillac fuel economy data to look at MPG among the Cadillac brand.

Tips to Maximize Efficiency

Use the CT5 V’s selectable driving modes to improve fuel efficiency when performance isn’t important. Setting the car to “Tour” or “Normal” mode will soften throttle response, encourage earlier upshifts, and help keep the engine in its most efficient range. Avoid aggressive acceleration and maintain a steady speed when possible, especially on the highway.

Regular maintenance is important for good fuel economy. Make sure the tires are properly inflated, as low tire pressure increases rolling resistance and reduces MPG. Also, keep up with scheduled oil changes and air filter replacements to keep the engine running efficiently.

Reduce extra weight in the vehicle. Extra cargo adds strain to the engine and results in lower MPG. Remove any items from the trunk that are not needed. Consider removing the spare tire if you only use the vehicle for commutes.

Plan your routes to avoid stop-and-go traffic. Idling in traffic consumes fuel without covering any distance. Use navigation apps to find the most efficient routes, even if they are slightly longer in terms of mileage.

Finally, be aware of your driving habits. Smooth acceleration, consistent speeds, and anticipatory braking all improve fuel economy. Avoid constantly engaging the turbochargers, as this will significantly impact your MPG. If you’re looking to save money on gas and use less gas, these small changes can make a difference over time.