16 MPG combined. That figure, viewed in isolation, sounds like a problem for any vehicle in today’s efficiency-minded market. But the 2021 Chevrolet Suburban 4WD with the 6.2L V8 isn’t just any vehicle. It’s a rolling behemoth of American exceptionalism, designed for those who prioritize space, power, and towing capacity above all else. Fuel economy is a necessary evil, not a primary concern, for the Suburban buyer. They have a boat to tow, a large family to transport, and a desire to do so in comfort and with authority.

City and highway performance

The EPA estimates peg the Suburban 6.2L’s city fuel economy at 14 MPG. This reflects the engine’s thirst when navigating stop-and-go traffic and the inherent inefficiency of moving a nearly three-ton vehicle from a standstill. Out on the open road, the Suburban fares slightly better, achieving a reported 19 MPG highway. The 10-speed automatic transmission certainly helps in this regard, keeping the engine in its most efficient rev range when cruising at consistent speeds. But even with its Dynamic Fuel Management cylinder deactivation, the sheer displacement of the 6.2L V8 demands a fair amount of fuel to maintain momentum.

Annual fuel cost

Brace yourself. The EPA estimates the annual fuel cost for the 2021 Chevrolet Suburban 4WD 6.2L at $3,600. This figure is based on driving 15,000 miles per year, with fuel prices reflecting a national average. It’s a stark reminder of the cost of admission into the full-size SUV club. If you are considering this vehicle, this level of expenditure should not come as a surprise, but it’s worth acknowledging the impact on your budget. Remember fuel costs will vary, especially if the majority of your driving is in city or highway conditions, or if the national average fuel price changes considerably.

Real-world expectations

EPA estimates provide a standardized baseline, but real-world MPG often deviates. Aggressive driving will significantly drop your fuel economy below the EPA numbers. Conversely, careful driving on long highway trips can potentially yield slightly better results. Factors like tire pressure, vehicle load, and environmental conditions also play a role. Regular maintenance, including timely oil changes and air filter replacements, can also make a small but noticeable impact on fuel efficiency over time. Don’t expect miracles, but realistic driving habits and proactive maintenance can help you stay closer to the EPA estimates.

How it compares

The 2021 Suburban’s fuel economy positions it squarely within the range expected of its full-size SUV competitors. The Ford Expedition with its 3.5L EcoBoost V6, for example, manages a slightly better 19 MPG combined in its 4×4 configuration. A similarly equipped GMC Yukon Denali with the same 6.2L V8 will deliver near identical results, highlighting that they share the same underpinnings. Even the less powerful 5.3L V8 versions of the Suburban offer only a marginal improvement in fuel economy. The Jeep Wagoneer with its 5.7L V8 lands in similar territory. For those buyers seeking something far superior, they may wish to consider alternatives. For example, if fuel economy is important, full-size SUVs are rarely the answer, but drivers may wish to view all Chevrolet fuel economy data or data on SUBURBAN MPG across all years and trims to compare.

Tips to maximize efficiency

Avoid aggressive acceleration. The 6.2L V8 is eager to unleash its power, but every hard launch and sudden burst of speed comes at a significant fuel cost. Smooth and gradual acceleration will minimize fuel consumption, especially in city driving.

Use cruise control on the highway. Maintaining a consistent speed is critical for maximizing fuel efficiency. Cruise control helps you avoid unnecessary speed fluctuations, especially on long highway drives, leading to better MPG.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which in turn reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended level specified on the door jamb sticker.

Lighten the load. The more weight you carry, the harder the engine has to work, and the more fuel you consume. Remove any unnecessary items from the vehicle, such as cargo or equipment that you don’t need to transport.

Consider using a fuel additive. While not a magic bullet, some fuel additives can help keep your fuel injectors clean and optimize engine performance. This can contribute to slightly improved fuel economy, though results may vary.