The phenomenon of car engines burning oil is troubling.

The phenomenon of car engines burning oil is troubling, and the reasons for it are varied. Burning oil actually refers to the engine oil entering the combustion chamber through specific pathways and participating in combustion along with the air-fuel mixture. The main causes include piston ring damage leading to cylinder blow-by, allowing oil to enter the combustion chamber. As the car's mileage increases, the wear between the piston and cylinder gradually intensifies. When the wear reaches a certain level, cylinder blow-by begins, resulting in the burning oil phenomenon. Additionally, damage to the valve stem seals can make the burning oil phenomenon more pronounced.

Clogging of the air filter can obstruct air intake, creating negative pressure that draws engine oil into the combustion chamber, also leading to oil burning. In the cooling system, excessive dirt in the radiator and a dirty condenser reduce ventilation and heat dissipation capacity, causing the engine operating temperature to rise. Excessively high temperatures degrade the quality of the oil film generated during friction, exacerbating cylinder wear.

Additionally, low-quality engine oil, or oil with viscosity that is either too high or too low, can lead to inadequate lubrication of the engine. This increases wear on the piston rings and cylinder walls, reducing sealing performance and consequently causing oil burning issues. Therefore, regularly replacing with high-quality oil is a crucial measure for maintaining engine health.