What Causes a Scooter to Burn Engine Oil?

[VonAngela]

The reasons for a scooter burning engine oil are as follows: 1. Piston Rings: The oil ring's elasticity is too weak, or there is excessive light leakage, leading to oil burning. 2. Valve Stem and Valve Guide: Excessive clearance between the valve stem and valve guide, or poor sealing by the valve oil seal, causes oil burning unrelated to the piston rings. Even after replacing the piston rings, oil burning persists. 3. Cylinder Dimensions: Excessive deviation, ovality, or surface scratches and grooves prevent the oil ring from scraping off excess oil from the cylinder wall, allowing oil to enter the combustion chamber and participate in combustion. 4. Cooling System: Poor quality or overheating leads to premature wear of the piston rings, scratches on the ring surfaces and cylinder walls, causing the engine to emit blue smoke. Regularly clean the air filter to ensure proper functioning. Maintain good engine cooling and avoid prolonged overload operation. After installing new piston rings, run them through the break-in period properly.