The 2020 Chevrolet Suburban K1500 4WD with the 6.2L V8 gets 16 MPG combined, a number that requires some context. This isn’t a compact crossover trying to maximize fuel efficiency. It’s a full-size, truck-based SUV built to haul families, tow substantial loads, and handle tough terrain. For people who prioritize space, capability, and power over saving money at the gas pump, the trade-off is one they accept.

City and highway performance

EPA estimates show 14 MPG in the city and 20 MPG on the highway, highlighting how much the Suburban’s fuel consumption changes in different driving conditions. Stop-and-go city driving, with its constant acceleration and braking, works the large V8 engine hard. The highway figure, while still modest, reflects the advantage of the 10-speed automatic transmission. It allows the engine to cruise at lower RPMs when possible. These numbers align with the reality of driving over 5,600 pounds of steel and equipment. This is no hybrid, and it performs accordingly.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Chevrolet Suburban K1500 4WD 6.2L is $3,600. This calculation assumes driving 15,000 miles per year and using national average fuel prices. It’s a significant figure, reinforcing the financial impact of owning such a large and powerful vehicle. This number is a wake-up call for some, but a simple budget item for the Suburban’s target buyer.

Real-world expectations

Real-world fuel economy for the Suburban often stays close to the EPA estimates, but several factors can change that number. Aggressive driving, heavy loads, and towing will significantly reduce fuel efficiency. Properly maintaining the vehicle, including tire inflation and regular maintenance, can help maximize gas mileage. Weather conditions also play a role. Colder temperatures often lead to lower MPG. And don’t forget the appeal of that 6.2L V8 because its effortless power delivery can be hard to resist, even if you know it will cost you more.

How it compares

Compared to other full-size SUVs, the 2020 Suburban’s fuel economy is generally similar to its competitors. The Ford Expedition, for example, gets around 17 MPG combined with its EcoBoost V6 engine. The Nissan Armada struggles to reach even 16 MPG in combined testing. Those seeking slightly better numbers from General Motors might consider a Suburban with the 5.3L V8, but that means giving up some of the power that comes with the 6.2L engine. People cross-shopping other segments might consider a minivan like the Chrysler Pacifica Hybrid, which offers significantly better fuel efficiency (82 MPGe combined). However, it doesn’t have the Suburban’s towing and off-road capabilities. This comparison matters to buyers who want to understand the inherent fuel cost of choosing the biggest SUV. More all Chevrolet fuel economy data is available online.

Tips to maximize efficiency

Anticipate traffic flow to avoid unnecessary acceleration and braking. Smooth and steady driving can significantly improve fuel economy, especially in city settings. The Suburban is not a sports car, so accelerate gradually.

Check your tire pressure regularly. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Maintaining the recommended tire pressure is a simple way to save money at the pump. Consult the sticker on your driver’s side door edge.

Minimize idling time. Letting the engine idle for extended periods wastes fuel. If you’re stopped for more than a minute, turn off the engine. This is especially true if you live in a place where idling laws are enforced.

Consider using cruise control on the highway. Maintaining a constant speed can help optimize fuel economy, especially on long trips. However, be mindful of hills, as the cruise control may downshift aggressively, reducing some of the benefits. Remember you can find SUBURBAN MPG across all years online.

Lighten the load. Removing unnecessary weight from the vehicle can improve fuel economy, even if only slightly. Every extra pound contributes to increased fuel consumption, so clear out any clutter. And think twice before taking non-essential driving journeys.