17 MPG combined. That’s what you get with the 2021 Chevrolet Colorado ZR2 4WD, equipped with the 3.6L V6. Its fuel economy isn’t exactly a bragging point. But the ZR2 isn’t bought by folks seeking optimal fuel efficiency. They’re after serious off-road capability, a bold look, and a truck that shrugs off challenges that would leave lesser vehicles stranded. The ZR2 buyer understands there’s a price to pay for that capability, and they’re usually happy to pay it at the pump.

City and highway performance

The EPA estimates the 2021 Chevrolet Colorado ZR2 at 16 MPG in the city and 18 MPG on the highway. Considering the ZR2’s knobby off-road tires, lifted suspension, and added weight due to skid plates and other protective gear, those figures aren’t entirely unexpected. The 3.6L V6, while reliable and offering ample power, isn’t the most fuel-conscious engine in GM’s lineup. It prioritizes low-end torque, which is beneficial for off-roading and towing, but it increases fuel consumption when combined with the ZR2’s inherent aerodynamic and mechanical inefficiencies. The eight-speed automatic transmission helps to maximize efficiency when cruising on the highway, but it can’t fully overcome the ZR2’s thirst.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Chevrolet Colorado ZR2 at $2,600. This is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind, this is just an estimate and your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and prevailing gas prices in your area. Expect to spend more than the EPA estimate if you primarily use your ZR2 for commuting in stop-and-go traffic, or if you frequently engage the four-wheel-drive system. You might see slightly lower costs if you primarily use it for long highway trips at a consistent speed.

Real-world expectations

While the EPA numbers provide a baseline, real-world fuel economy for the Colorado ZR2 often falls below those figures. Aggressive driving, frequent off-road excursions, aftermarket modifications like larger tires, and even the addition of a roof rack can all negatively impact fuel consumption. Owners who live in mountainous regions or frequently tow will also likely see a dip in MPG. ZR2 owners often report combined fuel economy in the 14-16 MPG range on average, highlighting the compromises inherent in owning such a capable off-road truck. Before purchasing, anyone should review COLORADO MPG across all years and consider their actual needs.

How it compares

Compared to other mid-size trucks, the Colorado ZR2 doesn’t fare particularly well in terms of fuel economy. A Toyota Tacoma TRD Pro, another dedicated off-roader, achieves around 18 MPG combined with its V6 engine. Even the standard four-wheel-drive Colorado with the same 3.6L V6 engine can often achieve 19-20 MPG combined, thanks to its less aggressive tires and suspension. The Jeep Gladiator Rubicon, perhaps the ZR2’s most direct competitor, also sees around 17 MPG combined with its V6 engine. The slightly heavier Gladiator is therefore a similar alternative to the Colorado ZR2. These MPG differences might seem small, but over the course of a year, they can add up to significant savings at the pump. Ultimately, the ZR2 buyer is choosing capability over efficiency and accepting this tradeoff. For all Chevrolet fuel economy data, visit the Chevrolet section of this site.

Tips to maximize efficiency

Avoid aggressive acceleration and braking. The ZR2’s V6 engine responds well to smooth, gradual throttle inputs. Jackrabbit starts and hard braking waste fuel and don’t really align with the ZR2’s intended purpose anyway. Drive with a lighter foot, anticipating traffic flow and maintaining a consistent speed whenever possible.

Keep your tires properly inflated. Low tire pressure increases rolling resistance, which in turn reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure listed on the doorjamb sticker. Make sure your tires are in good condition and properly aligned.

Minimize the use of four-wheel drive. Only engage four-wheel drive when you actually need it, such as when driving on loose surfaces or in slippery conditions. Driving in four-wheel-drive on dry pavement unnecessarily increases fuel consumption and can cause damage to the drivetrain.

Reduce aerodynamic drag. Remove any unnecessary items from the roof rack or bed of the truck, as these can increase aerodynamic drag and reduce fuel economy. Also, consider using a tonneau cover to help smooth airflow over the bed of the truck.

Consider fuel additives. Some fuel additives claim to improve fuel economy by cleaning fuel injectors and optimizing combustion, but this isn’t a guaranteed solution. Research different additives and choose a reputable brand if you decide to try this approach.