1. Worn Piston Rings: Worn or damaged piston rings can cause oil to seep into the combustion chamber, leading to oil burning.
2. Worn Valve Seals: Worn or damaged valve stem seals can allow oil to leak into the combustion chamber, resulting in oil burning.
3. Faulty PCV Valve: A faulty or clogged positive crankcase ventilation (PCV) valve can cause excessive pressure in the crankcase, leading to oil leaks and oil burning.
4. Damaged Cylinder Walls: Scratched or damaged cylinder walls can allow oil to bypass the piston rings and enter the combustion chamber, causing oil burning.
5. Incorrect Oil Level: Overfilling the engine with oil can cause excessive pressure in the crankcase, leading to oil leaks and oil burning.
6. Faulty Oil Control Ring: If the oil control ring on the piston is damaged or not functioning properly, it may not effectively scrape oil from the cylinder walls, resulting in oil burning.
7. Worn Engine Bearings: Worn engine bearings can allow oil to leak into the combustion chamber, causing oil burning.
8. Leaking Gaskets: Leaking gaskets, especially around the head or oil pan, can allow oil to escape and burn off.
9. Excessive Engine Wear: As an engine accumulates mileage and operating hours, the internal components can wear out, leading to increased oil consumption and burning.
10. Engine Overheating: Overheating can lead to the breakdown of oil and increased evaporation, resulting in oil burning.
11. Oil Viscosity: Using the wrong oil viscosity can affect how the oil performs in the engine. If the oil is too thin, it may not provide adequate lubrication and can lead to increased wear and oil burning.
12. Improper Maintenance: Insufficient or infrequent oil changes, using low-quality oil filters, and neglecting engine maintenance can contribute to oil burning issues.
Note: It's essential to consult with a qualified mechanic or refer to the specific service manual for your 1987 Suzuki Quadsport 230 to accurately diagnose and address the cause of oil burning.
