What are the main causes of excessive oil consumption?
1 Answers
The main causes of excessive oil consumption are: 1. Piston ring wear or damage, misaligned or incorrectly installed piston rings. When piston rings wear out, their elasticity weakens, reducing the compression force on the cylinder wall and diminishing oil scraping effectiveness. Additionally, wear between piston rings and ring grooves increases side and back clearances, allowing more oil to escape; 2. Excessive clearance between pistons and cylinder walls; 3. Severe wear of intake valve guides. During the intake stroke, under the vacuum effect in the intake manifold, lubricating oil enters the cylinder in large quantities through the clearance between the valve stem and guide hole and gets burned; 4. Excessive oil level; 5. The viscosity of the added oil is too low; 6. The engine speed is too high.