What Causes a Car to Lack Power and Have High Fuel Consumption?

[JulianRose]

There are several reasons why a car may lack power and have high fuel consumption: 1. Temperature effects causing fuel consumption fluctuations: Generally, in winter when temperatures are low, fuel consumption increases, almost comparable to using air conditioning in summer. This is because lower 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 oil results in poor lubrication, increasing resistance in the engine's moving parts and requiring more energy to overcome this resistance, thus 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.