What to Do If a Car Burns Excessive Engine Oil?

[KatherineRose]

Solving the issue of severe engine oil burning fundamentally requires disassembling and repairing the engine, replacing worn-out components. Below are the reasons for excessive oil burning: 1. Excessive wear of the cylinder liner or piston, or piston ring failure. 2. Poor cylinder sealing, mainly due to excessive clearance between the piston and cylinder wall, improper installation or degraded sealing of piston rings, allowing oil from the cylinder wall to enter the combustion chamber, causing oil burning. Additionally, poor sealing performance of the valve seal ring, damage to the crankcase ventilation valve, or blockage of the crankcase ventilation port leading to excessive pressure inside the crankcase can all cause oil to enter the cylinder along with crankcase gases and participate in combustion. 3. During the break-in period of a new car, exceeding a maximum speed of 90 km/h or engine speed exceeding three-fourths of the maximum rated speed can lead to oil burning.