What does comprehensive fuel consumption mean?

[DiCharles]

Comprehensive fuel consumption refers to the different fuel consumption performances of a car on different roads. In the past, car manuals would provide fuel consumption under near-ideal conditions, but now some cars provide fuel consumption based on a certain proportion of various road conditions, which is closer to the actual usage of general users. The reasons for increasing fuel consumption are as follows: 1. Temperature effects causing fuel consumption fluctuations: Generally, in winter when temperatures are low, fuel consumption increases, almost comparable to fuel consumption when using air conditioning in summer. This is because low temperatures cause the engine to dissipate more heat. 2. Lack of vehicle maintenance over time: Dirty engine oil and air filters can also lead to increased fuel consumption. Dirty engine oil results in poor lubrication, increasing resistance in various moving parts of the engine, requiring more energy to overcome the resistance, thus increasing fuel consumption. 3. Spark plugs needing replacement: Spark plugs are often overlooked. Even if they can still function, insufficient ignition energy can cause delayed ignition, missing the optimal ignition timing. This is what comprehensive road condition fuel consumption means.