Why is the car's fuel consumption increasing?

[DelOlivia]

The reasons for the increasing fuel consumption of the car are as follows: 1. Temperature fluctuations affecting fuel consumption: Generally, in winter when temperatures are low, fuel consumption tends to increase, almost comparable to the fuel consumption when using air conditioning in summer. This is because lower temperatures cause the engine to dissipate more heat. 2. Lack of regular vehicle maintenance: Dirty engine oil and air filters can also lead to increased fuel consumption. Dirty oil results in poor lubrication, increasing resistance in the engine's moving parts and requiring more energy to overcome this resistance, thereby raising fuel consumption. 3. Spark plugs needing replacement: Spark plugs are often overlooked. Even if they can still function, worn spark plugs may cause delayed ignition due to insufficient energy, missing the optimal ignition timing.