◆ Damage to the sealing surface and oil seal of the engine will cause leakage of lubricating oil. Once the leakage occurs, it can be observed on the outside of the engine. If the exhaust pipe emits blue smoke, the lubricating oil enters the combustion chamber and is burned off, and the lubricating oil can enter the combustion chamber through four ways;

- Wear occurs between the conduit and the valve rod, and the gap is too large during the intake stroke. The oil drips from the valve cover will enter the combustion chamber along the gap. Once the intake valve oil shield fails (falls out or is damaged), it cannot effectively prevent the oil from entering the combustion chamber through the valve.

The loss of piston ring and gas red wall is too large, and the scraping effect of oil ring is weakened. Get the oil into the combustion chamber.

- The crankcase ventilation width is bonded and cannot be moved, the effect of controlling the ventilation volume is lost, and the excessive lubricating oil vapor in the crankcase will enter the intake pipe through the crankshaft ventilation pipe.

◆ In addition to burning oil, excessive oil consumption may also exist for the following reasons:

After a new change of lubricating oil. Users are starting to pay attention to fuel consumption. It was high. I just didn't notice. An engine is leaking oil, with special attention to the crankshaft.

- Too much oil was added.

- With a fake oil filter