Why Do Older Cars Consume More Fuel?
1 Answers
Old cars have higher fuel consumption due to sensor damage. There are various sensors near the engine, such as the water temperature sensor, oxygen sensor, intake air temperature sensor, air flow sensor, and knock sensor. If any of these sensors malfunction, the car's fuel consumption will increase. The most common scenario is a damaged oxygen sensor, which leads to increased fuel consumption. The normal operation of a car engine relies on sensors. Issues like engine carbon buildup, sensor problems, or engine malfunctions can prevent the engine from working properly. With advancements in automotive manufacturing technology, mechanical components rarely suffer from severe failures, while the probability of electronic system failures is relatively higher, especially in older cars. The oxygen sensor needs replacement and cannot be used indefinitely. Engine carbon buildup increases over time. Many old cars have never had their carbon deposits cleaned, leading to significant carbon buildup in the engine. Carbon deposits have an adsorption effect. If gasoline is adsorbed by carbon deposits after injection, the engine will lose power, increasing fuel consumption. Engine wear also contributes to higher fuel consumption. As usage time increases, the engine will experience wear and tear. When the engine cylinder walls wear out, the gap between the cylinder and piston rings increases. During the power stroke, explosive combustible mixtures can leak through the gap between the cylinder and piston rings, reducing vehicle power and increasing fuel consumption.
