What is the difference between valve stem seals and piston rings burning oil?

[LaColeman]

Valve stem seals and piston rings burning oil have the following differences: Different locations: Valve stem seals are located on the intake and exhaust valves, while piston rings are inside the cylinder block. Different functions: Each intake and exhaust valve is equipped with a valve stem seal, whose function is to prevent oil from leaking into the cylinder. Typically, the outer layer of a valve stem seal is made of copper, which encases plastic rubber and a spring. The function of piston rings is to separate the oil from the combustion chamber, preventing oil from entering the combustion chamber. Different ways of burning oil: Aging valve stem seals can lead to sealing failure, allowing oil to seep into the cylinder, resulting in oil burning. Piston rings and cylinder liners are constantly in a state of friction. If a gap forms between the piston rings and the cylinder liner, oil will enter the combustion chamber, causing oil burning.