What are the reasons for high fuel consumption?

[DeHannah]

Car fuel consumption is high for the following reasons: Temperature: Fuel consumption fluctuates due to the influence of temperature. Generally, in winter when temperatures are low, fuel consumption increases somewhat, almost comparable to fuel consumption when using air conditioning in summer. Car maintenance: If the vehicle has not been serviced for a long time, dirty engine oil and air filters can also lead to increased fuel consumption. Dirty engine oil results in poor lubrication, causing increased resistance in various moving parts of the engine, requiring more energy to overcome the resistance, thus increasing fuel consumption. Spark plug replacement: Once the spark plugs reach the end of their lifespan, although they can still be used, the insufficient ignition energy will cause delayed ignition, missing the optimal ignition timing. Insufficient tire pressure: Low tire pressure increases the contact area between the tires and the ground, leading to greater friction, which means increased driving resistance and higher fuel consumption.