What are the reasons for diesel vehicles generally consuming more fuel?

[BethanyRose]

Diesel vehicles generally consume more fuel due to the following reasons: 1. The injector nozzles become clogged with carbon deposits from incomplete combustion during long-term use, and the air filter, idle motor, and throttle valve are too dirty; 2. The ignition module malfunctions, resulting in weak high-voltage sparks, reduced ignition capability, and incomplete combustion of some fuel mixtures, leading to increased fuel consumption; 3. The valve clearance is either too large or too small, and the valves and valve seats are eroded, preventing the valves from achieving ideal sealing, which reduces engine power. Precautions for refueling: 1. Choose to refuel when the temperature is relatively low; 2. If the vehicle is not used for a long time or used infrequently, keep a small amount of fuel; 3. Avoid refueling when a fuel tanker is unloading; 4. Turn off the engine when refueling a gasoline vehicle.