21 MPG combined isn’t going to win any awards for fuel efficiency, but for the 2021 Cadillac XT5 AWD with the 3.6L V6, it’s a figure that many buyers readily accept. This vehicle prioritizes a smooth and responsive driving experience, a luxurious interior, and all-weather confidence over outright fuel efficiency. The typical XT5 AWD buyer isn’t hyper-focused on minimizing their gas bill; they value comfort, utility, and the Cadillac badge. This isn’t a commuter car, it’s a versatile luxury SUV for families or empty-nesters who want a refined and capable vehicle for everyday life and weekend getaways.

City and highway performance

The EPA estimates suggest 18 MPG in the city and 26 MPG on the highway. The city mileage reflects the inherent inefficiency of stop-and-go driving, where the engine frequently idles and accelerates. City driving with the XT5’s V6 and standard nine-speed automatic transmission means frequent gear changes that impact efficiency. The highway figure is more respectable, as the engine settles into a more efficient cruising RPM.

The transmission’s higher gears help to lower engine speed at highway speeds, improving fuel consumption. However, the XT5’s all-wheel-drive system, while enhancing traction and stability, adds weight and mechanical drag, which contributes to a slight reduction in highway MPG compared to front-wheel-drive models.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Cadillac XT5 AWD 3.6L is $2,100. This figure is based on driving 15,000 miles per year and using national average fuel prices. This is a standardized calculation designed to allow consumers to compare the fuel costs of different vehicles. Your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and local fuel prices. Someone who primarily drives in congested city traffic will likely spend more than $2,100, while someone who mostly drives on the highway might spend less.

Real-world expectations

While the EPA estimates provide a benchmark, real-world fuel economy often differs. Many XT5 owners report that achieving the EPA’s 26 MPG highway estimate is possible on longer trips, especially when using cruise control and maintaining a steady speed. Aggressive acceleration, frequent short trips, and driving in hilly terrain can significantly lower fuel economy.

Owners should also be aware that using premium fuel, while not required, could slightly improve performance and potentially fuel economy though this is not a guarantee.

How it compares

The XT5’s fuel economy places it squarely in the middle of its competitive set. The Acura RDX achieves a slightly better 22 MPG combined with its turbocharged four-cylinder engine, but some drivers prefer the XT5’s V6 for its smoother power delivery. The Lexus NX 300 offers similar fuel economy to the XT5 around 22 MPG combined. Other competitors can include the Volvo XC60; the T5 models achieve around 25 combined, and the plug-in hybrid T8 eAWD offers 26 MPG combined, though the PHEV has a much higher price point.

For buyers prioritizing fuel efficiency above all else, these can make it a more attractive alternative than the XT5. The fuel economy difference isn’t vast, and many buyers prioritize features, styling, and brand reputation when making their decision. Anyone interested in all Cadillac fuel economy data should review all their options before deciding.

Tips to maximize efficiency

Avoid aggressive acceleration. The XT5’s V6 engine is responsive, but each hard acceleration burns extra fuel. Accelerate smoothly and gradually to improve your fuel economy, especially in city driving. Use the cruise control on the highway to maintain a consistent speed and prevent unnecessary fluctuations in fuel consumption. Maintaining a steady speed minimizes the amount of fuel needed by the engine.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended level, which can be found on a sticker inside the driver’s side door. Properly inflated tires also improve handling and safety.

Reduce excess weight in the vehicle. Carrying unnecessary cargo adds weight, which forces the engine to work harder and consume more fuel. Remove anything you don’t need from the trunk and passenger area. Even small weight reductions can have a noticeable impact on fuel efficiency over time.

Consider using the Tour driving mode. The XT5 offers different driving modes optimized for various conditions. The Tour mode prioritizes fuel efficiency by adjusting the engine and transmission settings. While it might slightly reduce responsiveness, it can help improve fuel economy during everyday driving. You can also review XT5 MPG across all years to see how different model years compare.