* Truck's weight and aerodynamics: A heavier truck or one with poor aerodynamics will get significantly worse fuel economy.
* Driving style: Aggressive driving habits drastically reduce fuel efficiency. Gentle acceleration and consistent speeds are key.
* Terrain: Driving uphill consistently will lower fuel mileage compared to flat terrain.
* Engine maintenance: Proper maintenance, including regular oil changes and filter replacements, directly impacts fuel efficiency.
* Load: Heavier loads naturally mean lower fuel economy.
* Engine configuration and modifications: The specific configuration of the N14 (e.g., horsepower rating) and any aftermarket modifications will affect fuel economy.
Therefore, there's no single answer to "what is the fuel mileage for an N14 Cummins?" You'll find figures ranging from 4-8 MPG (miles per gallon) cited online, but those are broad estimates and may not reflect real-world performance in your specific situation. Expect the lower end of that range for heavier loads and demanding terrain.
