25 MPG combined isn’t going to win the 2018 Cadillac ATS AWD 2.0L any fuel economy awards. That number, while seemingly average, needs to be viewed through the lens of what this car is: a relatively compact, all-wheel-drive luxury sedan focused on providing a balanced driving experience. This isn’t a Prius competitor, nor is it trying to be. The ATS driver prioritizes sharp handling, distinctive styling, and a certain level of prestige over squeezing every last mile from each gallon. They’re willing to trade ultimate fuel savings for a dose of sporting character and all-weather confidence that front-wheel-drive economy cars simply can’t deliver.

City and highway performance

The EPA estimates suggest you’ll see 22 MPG in the city and 30 MPG on the highway. The city figure reflects the reality of stop-and-go traffic, where the 2.0L turbocharged engine can be thirstier than expected. In these conditions, the ATS’s weight and all-wheel-drive system work against it. However, the highway number is more respectable, highlighting the benefits of the eight-speed automatic transmission’s ability to keep the engine in its most efficient operating range at cruising speeds. Highway driving, with minimal acceleration demands, allows the turbocharger to remain relatively inactive, boosting fuel efficiency. The key takeaway is that your mileage will vary considerably based on your driving environment; a predominantly highway commute will yield significantly better results than a life confined to urban congestion.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2018 Cadillac ATS AWD 2.0L at $2,300. This figure is calculated based on driving 15,000 miles per year and using national average fuel prices. Remember that this is just an estimate. Your actual fuel costs may be higher or lower depending on several factors, including your individual driving habits, the type of fuel you use (premium fuel is typically recommended for optimal performance), and local fuel prices. Aggressive driving, frequent short trips, and sustained high speeds will all contribute to higher fuel consumption, and thus, a higher annual fuel bill.

Real-world expectations

While the EPA provides a standardized benchmark, real-world MPG often differs. Owners of the 2018 Cadillac ATS AWD 2.0L frequently report figures hovering around the EPA’s combined estimate, though results vary. Some owners, with careful driving habits and primarily highway commutes, report exceeding 30 MPG on long trips. Conversely, those who live in heavily congested urban areas and drive aggressively may struggle to achieve even the EPA’s 22 MPG city rating. Terrain also plays a role: driving in hilly or mountainous areas will likely reduce fuel economy due to the increased engine load. Considering all these variables, it’s reasonable to expect a real-world combined MPG in the low to mid-20s for most drivers.

How it compares

Compared to its competitors, the 2018 Cadillac ATS AWD 2.0L occupies a middle ground in terms of fuel efficiency. The BMW 320i xDrive, for example, achieves a comparable 28 MPG combined. The Audi A4 quattro with the 2.0T engine also delivers around 27 MPG combined. The Mercedes-Benz C300 4MATIC posts similar numbers. However, opting for the higher-performance ATS models, such as those equipped with the V6 engine, will result in a noticeable drop in fuel economy, often falling below 20 MPG combined. The Acura TLX SH-AWD, while offering a larger V6 engine, sometimes achieves slightly better highway MPG, highlighting the complexities of fuel efficiency comparisons. For those prioritizing lower fuel costs, hybrid options like the Lexus IS 300h offer significantly higher MPG, but sacrifice some of the ATS’s sporty driving dynamics. Checking ATS MPG across all years can also illuminate any MPG changes across model years.

Tips to maximize efficiency

Gentle acceleration is crucial. The 2.0L turbo responds readily to throttle input, but rapid acceleration burns significantly more fuel. Smooth, gradual acceleration allows the engine to operate more efficiently and reduces the need for the turbocharger to spool up, saving gas in the process. Practice anticipating traffic flow and avoid sudden bursts of speed, which can negatively impact your MPG.

Regular maintenance is important for optimal fuel economy. Ensure your tires are properly inflated to the recommended pressure, and keep up with scheduled oil changes and air filter replacements. A well-maintained engine runs more efficiently, directly translating to better gas mileage. Neglecting these simple tasks can lead to a gradual decrease in fuel economy over time.

Minimize idling. Letting your engine idle for extended periods consumes fuel without covering any distance. If you anticipate being stopped for more than a minute, it’s generally more fuel-efficient to turn off the engine. Modern starters are designed to withstand frequent starts and stops, so this practice won’t cause undue wear and tear. This is especially applicable in urban environments with frequent stoplights and traffic congestion.

Consider using cruise control on the highway. Cruise control helps maintain a consistent speed, preventing unnecessary acceleration and deceleration that can waste fuel. However, be mindful of hilly terrain; cruise control may downshift aggressively on inclines, negating some of the fuel-saving benefits. In such situations, manually controlling your speed may be more efficient. You can view all Cadillac fuel economy data here.

Lighten the load. Excess weight puts a strain on the engine, reducing fuel economy. Remove any unnecessary items from your trunk or cargo area. While the impact of a few extra pounds may seem negligible, it adds up over time. Consider removing roof racks or cargo carriers when not in use, as they increase aerodynamic drag, further diminishing fuel efficiency.