The 2015 Chevrolet Suburban K1500 4WD with the 5.3L V8 gets 18 MPG combined. Some might groan at that number, but Suburban owners understand. This isn’t a vehicle buyers choose to save money on gas; they choose it for its large interior, strong towing capacity, and ability to haul a lot of people and gear. Buyers knowingly make a trade-off with fuel economy.

City and highway performance

EPA estimates for the 2015 Suburban K1500 4WD are 15 MPG in the city and 22 MPG on the highway. The city figure reflects the engine’s need to work harder in stop-and-go traffic, moving the Suburban’s heavy weight from a stop. The highway number looks better, where the engine can cruise, helped by the six-speed automatic transmission. Even on the open road, getting that 22 MPG consistently requires a light foot and avoiding high speed. Accelerating hard and driving above 70 mph will quickly decrease fuel economy.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2015 Chevrolet Suburban K1500 4WD at $2,450. This is based on driving 15,000 miles per year and using national average fuel prices. Remember that changes in gas prices will directly affect this number, and driving habits can significantly change the actual cost. Someone who drives mainly in the city or often tows a trailer will likely spend more than this estimate, while a driver with mostly highway miles and gentle driving might spend less. $2,450 is the official benchmark.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy often differs. Suburban owners often report numbers slightly below the official figures, especially in mixed driving. Things such as tire pressure, vehicle maintenance, and cargo weight can all affect fuel use. Owners who regularly tow will see a large drop in MPG. It is common to see single-digit fuel economy when towing a heavy trailer uphill. But careful attention to maintenance and conservative driving can help get numbers closer to the EPA estimates.

How it compares

Compared to its rivals, the 2015 Suburban’s fuel economy is similar to other full-size, body-on-frame SUVs. The Ford Expedition 4×4 with its 3.5L EcoBoost V6, for example, gets similar fuel economy, around 16 MPG combined. The Toyota Sequoia 4×4, with its thirsty 5.7L V8, gets an EPA-estimated 14 MPG combined. Newer SUVs with smaller engines and more advanced transmissions may offer slightly better numbers, but they often sacrifice towing capacity and interior space. For example, a 2023 Chevrolet Traverse gets 20 MPG combined, but it is not for the same buyer looking for maximum towing and cargo capacity like the Suburban.

The decision to buy a 2015 Suburban often comes down to priorities: space, capability, and durability are more important than saving on fuel. For those who need to haul large families, tow trailers, or transport significant cargo, the Suburban remains one of the few vehicles that can truly handle it all. Buyers can explore all Chevrolet fuel economy data, or check out more information about SUBURBAN MPG across all years.

Tips to maximize efficiency

Make sure tires are properly inflated. Keeping the correct tire pressure, as shown on the doorjamb sticker, reduces rolling resistance and improves fuel economy. Regularly check and adjust your tire pressure, especially when the temperature changes. Even a few PSI below the recommended level can hurt MPG.

Avoid idling. Idling uses fuel without going anywhere. If you think you will be stopped for more than a minute, turn off the engine. This simple habit can save a lot of fuel, especially in city driving.

Drive smoothly and predict traffic. Accelerating hard and braking hard waste fuel. Keep a steady speed, avoid changing lanes a lot, and look ahead to see how traffic is moving. Using cruise control on the highway can help keep a consistent speed and get better fuel economy.

Keep up with maintenance. A well-maintained engine runs better. Follow the recommended maintenance schedule for oil changes, air filter replacements, and spark plug replacements. A clean air filter and new spark plugs can improve combustion and MPG.

Consider cargo and towing. Extra weight lowers fuel economy. Only carry what you need and remove anything extra. When towing, spread the load evenly and do not exceed the vehicle’s maximum towing capacity. Reducing weight, even a little, can make a difference in fuel consumption.