25 MPG combined isn’t going to win any hypermiling awards, but for the 2018 GMC Canyon 2WD with the 2.8L Duramax diesel, it strikes a practical balance between capability and efficiency. This isn’t a Prius; it’s a mid-size truck designed to haul, tow, and tackle light off-road duties, appealing to buyers who value utility but still need reasonable fuel consumption for daily driving.

City and highway performance

The EPA estimates 22 MPG in the city and 30 MPG on the highway for this specific Canyon configuration. The city number reflects the inherent inefficiency of stop-and-go driving, where the diesel engine, despite its impressive torque, consumes more fuel during acceleration from a standstill. The highway figure, however, is where the diesel shines. Cruising at steady speeds, the torquey 2.8L effortlessly maintains momentum, requiring less throttle input and resulting in commendable fuel economy. This makes it a viable option for those who regularly commute or embark on longer road trips.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,250 for the 2018 GMC Canyon 2WD 2.8L diesel. This figure is based on driving 15,000 miles per year and using the national average fuel price for diesel at the time of calculation. Individual fuel costs will vary depending on driving habits, local fuel prices, and the type of driving encountered. While the initial purchase price of a diesel Canyon is typically higher than its gasoline counterparts, the fuel savings can help offset that difference over time, especially for high-mileage drivers.

Real-world expectations

While the EPA estimates provide a baseline for comparison, real-world fuel economy can vary significantly. Factors such as driving style, load, terrain, and weather conditions all play a role. Aggressive acceleration, frequent heavy braking, and consistently carrying heavy loads will all decrease fuel efficiency. Similarly, driving in hilly terrain or experiencing strong headwinds will increase fuel consumption. However, drivers who adopt a more conservative driving style, minimize unnecessary idling, and properly maintain their vehicle can often achieve fuel economy figures that meet or even exceed the EPA estimates. Looking at CANYON MPG across all years can provide a broader view of owner experiences.

How it compares

The Canyon’s fuel economy stacks up differently depending on the competition. A comparable gasoline-powered 2018 Toyota Tacoma 2WD with its 2.7L four-cylinder engine achieves an EPA-estimated 20 MPG combined, making the diesel Canyon a more economical choice, particularly on the highway. A Chevrolet Colorado 2WD with the gasoline V6 comes in around 21 MPG combined. However, the 4WD models of these trucks often see a decrease of 2-3 MPG. When considering all Gmc fuel economy data, the diesel Canyon stands out as a relatively efficient option within the GMC truck lineup, especially compared to the larger Sierra. The diesel engine’s efficiency advantage is most evident when comparing it to gasoline-powered mid-size trucks used for towing or hauling, tasks for which the diesel’s torque provides a significant benefit without a drastic fuel economy penalty.

Tips to maximize efficiency

Diesel engines benefit from smooth and steady acceleration. Avoid aggressively stomping on the accelerator, as this burns excessive fuel and creates unnecessary wear and tear. Instead, gradually increase speed, allowing the engine to reach its optimal torque range efficiently. This is particularly important when towing or carrying heavy loads.

Maintain proper tire pressure. Under-inflated tires increase rolling resistance, which directly impacts fuel economy. Regularly check your tire pressure and inflate them to the recommended specifications listed on the driver’s side doorjamb. Even a small difference in tire pressure can noticeably affect fuel consumption.

Minimize idling. Modern diesel engines don’t require extended warm-up periods. Excessive idling wastes fuel and contributes to unnecessary wear on engine components. If you anticipate being stationary for more than a minute or two, it’s best to turn off the engine.

Adhere to the manufacturer’s recommended maintenance schedule. Regular oil changes, air filter replacements, and fuel filter maintenance are critical for maintaining optimal engine performance and fuel efficiency. A well-maintained engine runs more smoothly and efficiently, resulting in improved fuel economy.

Consider using cruise control on long highway drives. Cruise control helps maintain a consistent speed, minimizing unnecessary acceleration and deceleration. This can lead to significant fuel savings, especially on relatively flat terrain. However, avoid using cruise control in hilly areas, as the system may downshift frequently, negating the fuel-saving benefits.