With all-wheel drive, the 2019 Cadillac ATS with the strong 3.6L V6 gets 21 MPG combined. Choosing this particular ATS means that fuel efficiency isn’t the only priority. The ATS, especially the AWD version with the V6, is about delivering a stimulating driving experience with some Cadillac luxury. It’s for the enthusiast who needs four doors and year-round usability, and who’s willing to accept middling fuel economy as part of the deal.

City and highway performance

The EPA estimates for the 2019 Cadillac ATS AWD 3.6L are 18 MPG in the city and 26 MPG on the highway. The city figure reflects the engine’s thirst in stop-and-go conditions, made worse by the added weight and drag of the all-wheel-drive system. The highway number is more respectable, taking advantage of the eight-speed automatic transmission’s ability to cruise in a fuel-efficient gear. Achieving that 26 MPG requires a disciplined right foot, however; enthusiastic applications of the throttle will quickly send that figure plummeting. If you are considering other options, take a look at the ATS MPG across all years.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,100 for the 2019 Cadillac ATS AWD 3.6L. This figure is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind this is just an estimate. Your actual expenses will vary depending on how much you drive, where you drive, and your driving style. Aggressive acceleration and frequent short trips will increase your fuel consumption, while consistent highway driving at moderate speeds will yield better results.

Real-world expectations

Expect the real-world MPG of the 2019 Cadillac ATS AWD 3.6L to change around the EPA estimates based on your driving habits. Short trips, city driving, and frequent use of the car’s performance potential will likely result in figures closer to the 18 MPG city rating. If your commute consists primarily of highway miles and you prioritize fuel economy, achieving or even slightly exceeding the 26 MPG highway rating is possible. However, consistently matching the combined 21 MPG figure requires a deliberate effort to drive efficiently.

How it compares

The fuel economy of the 2019 Cadillac ATS AWD 3.6L places it in a crowded field with other similarly equipped luxury sedans. The BMW 340i xDrive, for example, achieves a slightly better 25 MPG combined, while still offering comparable performance. The Audi S4, with its supercharged V6 and standard all-wheel drive, also gets an EPA-estimated 24 MPG combined. The Mercedes-Benz C43 AMG, while significantly more powerful, still manages a respectable 22 MPG combined. For buyers cross-shopping these models, fuel economy is just one piece of the puzzle; performance, features, and brand cachet play equally important roles. Consider viewing all Cadillac fuel economy data, including the Cadillac CT4, if fuel economy is your top priority.

Tips to maximize efficiency

Aggressive driving significantly impacts fuel economy in the ATS 3.6L. Avoid rapid acceleration and hard braking. Progressive acceleration and maintaining a steady speed will help to conserve fuel and keep you closer to the EPA estimates.

The Cadillac ATS has different drive modes that can alter the engine’s computer for better fuel mileage. “Tour” mode will soften throttle response and prioritize higher gears and lower RPMs. This provides the best possible fuel mileage on the highway or in the city.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces MPG. Check your tire pressure regularly and inflate them to the recommended pressure listed on the driver’s side doorjamb.

Avoid unnecessary weight in the vehicle. Remove any items you don’t need, as extra weight increases fuel consumption. Every little bit helps when trying to squeeze out extra miles per gallon.

Regular maintenance is essential for optimal fuel economy. Make sure to follow the recommended maintenance schedule for your ATS, including oil changes, air filter replacements, and spark plug replacements. A well-maintained engine runs more efficiently, which translates to better MPG.