What are the reasons for increasing car fuel consumption?

[EdwardRose]

Here are the reasons why car fuel consumption is increasing: 1. Spark plugs not replaced: Spark plugs are often overlooked. Even if they can still function after their lifespan, they may cause delayed ignition due to insufficient energy, missing the optimal ignition timing. This also leads to incomplete combustion, further increasing fuel consumption. 2. Insufficient tire pressure: Low tire pressure increases the contact area between the tires and the ground, leading to greater friction and thus higher driving resistance, which raises fuel consumption. Insufficient pressure also shortens tire lifespan and increases the risk of blowouts on highways. Therefore, tire pressure should be checked regularly, at least every two months. If the car has a tire pressure monitoring system, it can be checked directly; otherwise, each tire should be manually measured with a tire pressure gauge. 3. Incorrect sensor data: For example, the coolant temperature sensor and oxygen sensor. If these sensors are not completely broken but provide inaccurate data, they won’t trigger a warning light, making it hard to detect without checking the data stream via a computer. For instance, if the coolant temperature sensor shows a lower temperature or the oxygen sensor indicates excessive oxygen content, the computer may inject more fuel, leading to incomplete combustion and higher fuel consumption. 4. Excessive carbon buildup: Carbon deposits can accumulate in the throttle body, fuel injectors, intake manifold, and piston tops. Excessive carbon in any of these areas can cause incomplete combustion, thereby increasing fuel consumption.