What are the reasons for the self-reduction of engine oil?
2 Answers
Engine oil self-reduction is caused by: 1. Aging of cylinders, pistons, or piston rings; 2. Weakened sealing of valve guides; 3. Aging of engine body sealing rings, leading to weakened sealing; 4. Loose bottom oil tank screws. Engine oil is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil's performance. It is divided into diesel engine oil and gasoline engine oil. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal and prevent leaks, prevent rust and corrosion, and provide shock absorption for the engine.
In my years of experience repairing cars, oil consumption is a common issue, primarily caused by internal engine component wear or sealing problems. For instance, worn piston rings allow oil to enter the combustion chamber and burn off, which you might notice as blue smoke in the exhaust. Oil leaks are another concern—a cracked oil pan gasket or failed valve cover seal can lead to slow seepage. A defective turbocharger system can also accelerate oil consumption. If left unaddressed, insufficient engine lubrication can hasten wear and even cause component failure. I always advise car owners to develop the habit of checking the oil dipstick level every two weeks when the engine is cold, and inspecting the ground for oil stains after parking overnight. Using high-quality oil brands during oil changes, combined with regular professional inspections, can effectively prevent major issues and extend engine life.
