24 MPG combined in the 2018 Cadillac CTS AWD with the 2.0L turbo four isn’t going to win any hypermiling competitions, but it’s a perfectly acceptable figure for a stylish, all-weather sports sedan aimed at buyers who prioritize driving dynamics and distinctive design over ultimate fuel efficiency. Those drawn to the CTS aren’t typically cross-shopping against Prius Primes; they’re seeking an engaging driving experience with a touch of American luxury, and they’re willing to accept a slightly higher fuel bill to get it.

City and highway performance

The EPA estimates for the 2018 CTS AWD 2.0L are 21 MPG in the city and 29 MPG on the highway. The city figure reflects the realities of stop-and-go traffic, where the engine’s turbocharger is frequently spooling up and down, and all-wheel drive adds parasitic drag. The 2.0L engine’s relatively quick response helps mitigate the sense of lag sometimes associated with small-displacement turbocharged engines in heavier vehicles. The 29 MPG highway rating is more promising, indicating that the CTS AWD can achieve reasonable fuel economy on longer trips when driven with a measured foot. The smooth-shifting 8-speed automatic transmission also contributes, keeping the engine in its most efficient operating range at cruising speeds.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2018 Cadillac CTS AWD 2.0L 4-cyl is estimated at $2,400. This figure is based on driving 15,000 miles per year and using national average fuel prices. Your personal fuel costs will vary depending on your driving habits, the type of fuel you use (premium is recommended), and local gas prices. Stop-and-go driving or aggressive driving will push that number up substantially, while consistent highway cruising could lower it.

Real-world expectations

While the EPA estimates provide a useful benchmark, real-world fuel economy often differs. Some drivers report MPG figures slightly below the EPA combined rating, particularly in predominantly city driving. However, those who spend a significant portion of their time on the highway often find that they can match or even exceed the 29 MPG highway estimate, especially when using a light touch on the accelerator and using cruise control. Factors like tire pressure, vehicle maintenance, and even ambient temperature can also influence fuel economy.

How it compares

Compared to its competitors, the 2018 Cadillac CTS AWD 2.0L’s fuel economy is roughly in line with other all-wheel-drive sports sedans in its class. For example, the BMW 330i xDrive achieves an EPA-rated 23 MPG combined, while the Audi A4 2.0T quattro is rated at 27 MPG combined, numbers that may slightly outperform the CTS. A Mercedes-Benz C300 4MATIC lands at 26 MPG combined. These are just numbers, and a prospective buyer might still choose the CTS for its distinctive styling, comfortable interior, or engaging driving dynamics. See all Cadillac fuel economy data here. And for a deeper dive, explore the CTS MPG across all years.

Tips to maximize efficiency

The 2.0L turbo engine in the CTS is sensitive to driving style. Aggressive acceleration and frequent hard braking will significantly reduce fuel economy. Instead, focus on smooth, gradual acceleration and anticipate traffic conditions to avoid unnecessary braking. Consistent, moderate driving will yield the best results.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended level, which can be found on the sticker inside your driver’s side door or in your owner’s manual.

Reduce unnecessary weight in the vehicle. Carrying extra weight, whether it’s luggage, sports equipment, or tools, puts additional strain on the engine and reduces fuel economy. Remove any items that you don’t need on a regular basis.

Use cruise control on the highway whenever possible. Cruise control helps maintain a consistent speed, which can improve fuel economy. Be mindful of terrain and driving conditions. On hilly roads, disengaging cruise control and manually adjusting your speed may be more efficient.