25 MPG combined isn’t going to win any fuel economy contests, but for the 2018 Chevrolet Colorado 2WD with the 2.8L Duramax diesel, it’s a compromise. This isn’t a truck for those wanting ultimate efficiency; it’s for those who need capability and durability without spending too much at the pump. Buyers who tow occasionally, want low-end torque, and like the longevity of diesel engines favor this engine.

City and highway performance

The EPA estimates of 22 MPG in the city and 30 MPG on the highway show more details. The city figure reflects the inefficiencies of stop-and-go driving, increased by the diesel engine’s need to build boost and its weight. However, the 30 MPG highway rating is impressive. When cruising at consistent speeds, the Colorado can use its optimized gearing and the diesel’s fuel-sipping to deliver good mileage over long distances. It’s ideal for those who commute longer distances or frequently take road trips, especially hauling equipment or smaller trailers.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2018 Chevrolet Colorado 2WD 2.8L diesel is $2,250. This is based on driving 15,000 miles per year and calculated using the national average fuel prices when the EPA tested it. Fuel price changes will impact this cost, so knowing your local prices relative to the national average is essential.

Real-world expectations

EPA estimates provide a baseline, but real-world fuel economy varies based on driving style, load, terrain, and even tire pressure. Aggressive acceleration and hard braking will decrease fuel economy. Towing, even within the Colorado’s rated capacity, will also have an impact. Buyers who consistently haul heavier loads or drive in hilly terrain should expect fuel economy closer to the combined rating, or even lower.

How it compares

Compared to its gasoline-powered versions, the diesel Colorado has an advantage in highway fuel economy. The base 2.5L gasoline Colorado gets around 20 MPG combined, while the V6 gets around 21 MPG combined. The Toyota Tacoma, another popular mid-size truck, typically achieves around 20-21 MPG combined with its V6 engine. The diesel delivers superior torque and towing capability alongside its efficiency, which many buyers find worthwhile. For instance, a similar Nissan Frontier manages around 19-20 MPG combined. Comparing the Colorado to all Chevrolet fuel economy data helps interested customers.

Tips to maximize efficiency

Use cruise control on the highway whenever possible. This helps maintain a consistent speed and minimizes unnecessary acceleration, allowing the diesel engine to operate at its most efficient RPM range. Diesels respond well to smooth inputs, which helps save fuel.

Regularly check and maintain proper tire pressure. Underinflated tires increase rolling resistance, causing the engine to work harder and consume more fuel. Check the sticker on the driver’s side doorjamb for the recommended tire pressure for your Colorado. This small step can have a positive impact.

Avoid idling. Diesel engines, especially newer ones, don’t need extended warm-up periods. Shutting off the engine during stops, like waiting at a train crossing or picking someone up, can save fuel.

Note aftermarket accessories. Adding heavy modifications like oversized tires or lift kits can negatively impact fuel economy. These modifications increase weight and aerodynamic drag, so the engine works harder. If you’re concerned about fuel efficiency, consider the impact of aftermarket modifications you plan to make. It also helps to compare the COLORADO MPG across all years.