What is Considered Fuel-Efficient for a Car's Fuel Consumption per 100 Kilometers?

[LeRose]

1.6L displacement family sedans with a comprehensive fuel consumption of around 7 liters per 100 kilometers are considered fuel-efficient, while 1.8L displacement models with approximately 9 liters per 100 kilometers are also deemed fuel-efficient. Below is relevant knowledge about a car's fuel consumption per 100 kilometers: 1. Concept of fuel consumption per 100 kilometers: This refers to the fuel consumption of a vehicle traveling 100 kilometers on the road at a certain speed. It is a theoretical indicator for vehicles. Manufacturers measure this value under objective conditions using a dynamometer installed on the vehicle's chassis, converting it into speed parameters, then calculating the theoretical experimental fuel consumption data per 100 kilometers for the model at specified speeds. 2. Relationship between fuel consumption and displacement: Although fuel consumption is related to displacement, this relationship is not absolute. A larger cylinder volume can accommodate more combustible mixture (air-fuel), so under otherwise identical conditions, engines with larger cylinder volumes (displacement) will inevitably have higher power output and higher fuel consumption.

[McGarrett]

I remember driving many cars, and generally, a fuel consumption below 6 liters per 100 kilometers is considered fuel-efficient. Most compact cars consume around 7 liters in urban driving conditions. For example, my current car averages 6.5 liters, which is quite economical. Driving habits have a significant impact—avoiding sudden acceleration and frequent braking can save a lot of fuel, especially in traffic jams where consumption spikes. Additionally, the car's own factors cannot be ignored, such as lightweight body design and efficient engine optimization, like some Japanese models that excel in this regard. Hybrids are even more fuel-efficient, but for pure gasoline cars, 6 liters is a good benchmark. On highways, performance improves further, with consumption dropping to around 5 liters. I recommend regular maintenance, like changing air filters, to maintain low fuel consumption—saving money and being eco-friendly in the long run.

[StBriella]

From an economic perspective, I consider a fuel consumption below 7 liters per 100 km as fuel-efficient because it saves a significant amount on fuel costs. I drive a compact car with a fuel consumption of 5.8 liters/100 km, saving hundreds on monthly fuel expenses compared to SUVs or older models that consume around 10 liters. The key is how you use the car—avoiding frequent acceleration and maintaining a steady speed can optimize fuel efficiency. When buying a car, I chose a fuel-efficient model. Nowadays, many cars on the market, like some small sedans, average around 6 liters, which is considered efficient. Other factors, such as low tire pressure increasing friction or using air conditioning in summer, can slightly raise fuel consumption. Overall, 6 liters is ideal, 7 liters is the baseline, and anything below that is truly worthwhile.

[DelVincent]

From a technical perspective, a car with fuel consumption under 6 liters per 100 kilometers is considered fuel-efficient, with engine efficiency being the key factor. Having studied various models, compact cars equipped with small-displacement turbocharged engines and good transmissions can easily achieve 5-6 liters per 100 km. For example, I've driven several models where lightweight bodies reduced resistance, averaging a very economical 5.5 liters. Vehicle weight and road conditions also affect results—highway driving yields lower consumption, sometimes dipping below 4 liters, while city driving is slightly higher. In contrast, large-displacement vehicles consuming over 8 liters are less economical. Future engine optimizations may lower this benchmark, but currently, 6 liters remains a good indicator.