What does fuel consumption per 100 kilometers mean?

[Terrance]

Fuel consumption per 100 kilometers refers to the amount of fuel consumed by a vehicle traveling 100 kilometers, which is an important parameter of a car. The fuel consumption per 100 kilometers published by the Ministry of Industry and Information Technology is a comprehensive data obtained under certain conditions and at a certain speed. The reasons for high fuel consumption in cars are as follows: poor ignition, excessive spark plug gap, insufficient energy from the ignition coil. Poor atomization of the fuel injector, failure of the fuel pressure regulator, excessive fuel pressure. Excessive engine carbon deposits, some of the injected gasoline is absorbed by the carbon deposits. Sensor failure, such as a faulty coolant temperature sensor, can cause the engine to mistakenly believe it is still in a cold state, continuously sending fuel injection signals, leading to high fuel consumption. A faulty oxygen sensor will cause fuel correction to fail, and the computer will also continuously send fuel injection signals. A faulty air flow meter will result in incorrect intake data. Factors affecting fuel consumption: There is a certain relationship between displacement and fuel consumption, but a higher fuel consumption does not necessarily mean a larger displacement. In a relative sense, the size of a car's displacement does not form a direct proportional relationship with fuel consumption. In addition to the size of the displacement, factors such as the car's shape, weight, and engine technology are also important factors affecting fuel consumption. Among models with the same displacement, the more advanced the engine technology, the more fuel-efficient the car will be.

[DelArianna]

I drive to work every morning and pay special attention to the L/100km value on the dashboard. The fuel consumption per 100 kilometers refers to the amount of gasoline the vehicle consumes for every 100 kilometers driven. For example, a display of 8.0 means it burns 8 liters of fuel per 100 kilometers. This number is directly related to the thickness of my wallet—with fuel prices so high now, a difference of one liter can cost me an extra hundred yuan per month. Over six years of driving, I've learned that smooth acceleration and less braking can reduce fuel consumption, while using the air conditioner in summer adds an extra 1-2 liters. The most outrageous instance was when my tire pressure was too low, causing the fuel consumption to skyrocket to 9.5 L/100km, but it immediately dropped to 8.3 after inflating the tires. During highway cruising, I keep an eye on the instantaneous fuel consumption display and find that maintaining 90 km/h is the most fuel-efficient.

[DeKarter]

Last time I accompanied a friend to choose a car, I realized many people overlook the fuel consumption label. The official term for 100km fuel consumption is NEDC combined cycle fuel consumption, which is the average fuel consumption measured under specific test conditions. Although the actual driving may deviate by 10%-20%, it serves as a valuable reference for horizontal comparison. For example, compact cars generally consume 5-7L/100km, while SUVs consume 7-10L. Pay attention to the fine print next to the fuel consumption label, which states the test temperature is 20-30°C; cold starts in winter can cause fuel consumption to skyrocket. I've seen people deliberately buy small-displacement cars to save money, only to end up using more fuel due to constant full loads and air conditioning usage. The key is to match the vehicle to your actual needs.

[JoannaLynn]

After ten years working in an auto repair shop, I've found that fuel consumption per 100 kilometers is the barometer of a vehicle's health. When a car that should consume 7 liters suddenly jumps to 9 liters, it's likely due to carbon buildup on the oxygen sensor or worn spark plugs. Last time a customer complained about soaring fuel consumption, we found the air filter clogged like a rag. For every 0.5 bar decrease in tire pressure, fuel consumption increases by 3%. Carrying over 50kg of junk in the trunk adds an extra 0.5 liters. Don't arbitrarily change oil viscosity either - switching from 5W-30 to 10W-40 will immediately increase fuel consumption. I recommend recording fuel refills and mileage monthly - calculating actual consumption yourself is more accurate than relying on the dashboard display.