How to Solve High Fuel Consumption in Diesel Vehicles?

[TimothyLee]

During the operation of diesel engines, polymer deposits adhere to valves, valve seats, fuel injectors, and piston tops. These carbon deposits increase fuel consumption and should be promptly removed. When diesel generator sets operate under overload conditions, they emit black smoke due to the incomplete combustion of fuel. Conduct regular or irregular mechanical inspections and perform frequent maintenance and repairs.

[KinsleyDella]

I found my diesel car consuming too much fuel and came up with several solutions. First, I needed to change my driving habits – rapid acceleration and hard braking consume the most fuel, while maintaining a steady speed is the most economical. Then, I checked the tire pressure; low pressure is like dragging your feet, causing fuel consumption to soar. Regularly replacing the air filter is also crucial; if it's clogged, the engine has to work harder. Another issue is fuel quality; poor-quality diesel doesn’t burn efficiently, so I started refueling only at reputable gas stations. Lastly, avoid idling while waiting – if it exceeds 3 minutes, just turn off the engine. These simple and practical tips don’t cost much but effectively reduce fuel consumption, as I’ve personally tested.

[DiBenjamin]

I've been driving a diesel pickup for transportation for over a decade, and fuel consumption issues are common. First, check the fuel injection system—clogged diesel injectors are the most critical issue; cleaning them once can save a lot of fuel. Insufficient fuel pump pressure also leads to poor atomization, so I recommend getting the fuel pressure tested at a repair shop. Aging seals on high-pressure fuel lines can cause leaks and should be replaced regularly. I perform fuel system cleaning every year, especially after long trips. Engine carbon buildup requires specialized additives for cleaning, and choosing the right brand is crucial. Don't skimp on these maintenance tasks to save small amounts of money, or you'll face higher repair costs later.

[EvelynRose]

High fuel consumption in diesel engines may indicate hidden mechanical faults. I once encountered a failed turbocharger seal ring, which caused insufficient air intake and incomplete combustion, immediately increasing fuel consumption by 20%. A stuck EGR valve can also lead to excessive exhaust gas recirculation, requiring disassembly and cleaning. A clogged diesel filter can cause poor fuel supply and needs replacement every three months. A malfunctioning oxygen sensor is the most easily overlooked issue; it disrupts the air-fuel ratio, and once the computer reports a fault code, immediate repair is necessary. Additionally, clutch slippage results in significant power loss and a sharp rise in fuel consumption. For these complex issues, it's advisable to visit a specialized repair shop for diagnosis with professional equipment.

[LaElliott]

To improve diesel vehicle fuel efficiency, start with driving habits. I noticed that overloading by 300kg during delivery increases fuel consumption by 1 liter. Using S mode to lock lower gears on hilly sections actually saves fuel. Driving with windows open at highway speeds consumes more fuel than using AC - 80km/h is the ideal speed for AC use. After cold starts, wait for RPM to stabilize before driving (max 30 seconds). Maintaining tire pressure 0.2bar above manufacturer standards reduces rolling resistance for better mileage. Implementing these details can reduce fuel consumption by 15% while extending engine life.