What are the reasons for the oil gauge indicating insufficient engine oil?

[MacNolan]

The reasons for the oil gauge indicating insufficient engine oil are: 1. Aging of the valve oil seal, where the rubber loses elasticity, resulting in poor sealing and oil leaking into the combustion chamber to burn; 2. Wear of the cylinder liner or insufficient tension of the piston rings; 3. Excessive clearance between the piston rings and the cylinder wall, improper installation of piston rings, or degraded sealing, weakening the oil ring's oil-scraping function; 4. Excessive wear between the guide and the valve stem, causing oil droplets from the valve cover to enter the combustion chamber along the gap while driving; 5. The crankcase ventilation valve sticks and cannot move, losing its function of controlling ventilation volume, allowing excessive oil vapor in the crankcase to enter the intake pipe through the crankcase ventilation tube.