The 2022 Chevrolet Suburban 4WD with the 3.0L Duramax diesel achieves 22 MPG combined, a surprisingly respectable figure for a vehicle that can comfortably haul eight passengers and tow a small house. This isn’t a vehicle purchased for hypermiling; it’s bought to accomplish tasks that smaller, more fuel-efficient vehicles simply can’t. Its thirst is tolerated, not celebrated, but it’s a trade-off many are willing to make for its unmatched versatility.

City and highway performance

The EPA estimates the Suburban 4WD 3.0L diesel at 20 MPG in the city and 26 MPG on the highway. These numbers reflect the engine’s torque-rich nature, allowing it to cruise effortlessly at highway speeds without straining, and the 10-speed automatic transmission, which keeps the engine in its sweet spot for efficiency. The city MPG suffers more, predictably, due to the vehicle’s substantial weight and the increased stop-and-go driving common in urban environments. But because the Duramax engine makes peak torque at just 1,500 RPM, it rarely needs to work hard to pull away from a stoplight, making it more efficient than the gasoline models in city driving.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Chevrolet Suburban 4WD with the 3.0L diesel at $2,550. This figure is based on driving 15,000 miles per year and using the national average fuel price. Of course, this is merely an estimate. Individual driving habits, local fuel prices, and even tire inflation can significantly impact the actual fuel cost you’ll incur. But it provides a standardized benchmark for comparing the Suburban’s fuel consumption to other vehicles on the market.

Real-world expectations

While the EPA estimates provide a useful baseline, real-world fuel economy can vary significantly. Owners report seeing figures close to the EPA estimates on long highway trips when driven conservatively. However, factors like frequent towing, aggressive driving, and mountainous terrain will certainly decrease fuel efficiency. Diesel fuel prices can fluctuate more than gasoline, so keeping an eye on fuel costs and planning your routes accordingly can help manage your fuel expenses. Many owners report that the diesel Suburban regularly exceeds the EPA estimates on the highway, but that it is difficult to match the city rating, especially with a heavy load.

How it compares

Consider the alternatives. The gasoline-powered 2022 Chevrolet Suburban 4WD with the 5.3L V8 is rated at just 16 MPG combined. The 6.2L V8 drops that number further. A Ford Expedition 4×4 with the EcoBoost V6 manages around 19 MPG combined. Even the smaller GMC Yukon 4WD with the same 3.0L diesel engine typically achieves similar MPG figures. The Jeep Wagoneer 4×4 with its standard gasoline engine struggles to reach even 18 MPG combined. For buyers who need the Suburban’s space and capability, the 3.0L diesel offers a strong argument compared to the significantly thirstier gasoline options. Before buying, you can view SUBURBAN MPG across all years to see if a prior model meets your needs.

Tips to maximize efficiency

Use the Suburban’s adaptive cruise control. When engaged, it maintains a consistent speed and following distance, helping to smooth out acceleration and braking, which significantly contributes to better fuel economy on the highway. Try to avoid aggressive acceleration. The Duramax diesel produces plenty of torque at low RPMs, so there’s rarely a need to stomp on the accelerator. Smooth, gradual acceleration will conserve fuel and reduce wear and tear on the vehicle.

Keep your tires properly inflated to the recommended pressure. This reduces rolling resistance, improving fuel economy and extending tire life. Check your tire pressure regularly, especially during temperature changes, as pressure can fluctuate.

Minimize idling. Excessive idling consumes fuel without covering any distance. If you anticipate being stopped for more than a minute or two, turn off the engine. Modern vehicles are designed to restart quickly and efficiently, so you won’t be causing undue wear and tear by frequently restarting.

Reduce unnecessary weight. Carrying extra cargo adds to the vehicle’s overall weight, which negatively impacts fuel economy. Remove any items you don’t need to carry regularly, such as sports equipment or tools.

Be mindful of towing. While the diesel Suburban is a capable tow vehicle, towing significantly reduces fuel economy. Plan your trips carefully, drive at moderate speeds, and properly distribute the load to minimize drag and maximize fuel efficiency. Consider using tow/haul mode only when necessary to avoid unnecessary engine strain.