Geely JL481Q, Manual

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Main causes for excessive engine oil consumption include engine oil combustion and leakage. The fundamental cause for
this case is poor sealing performance of sealing parts. Possible reasons for engine oil burnout are as follows:
1. Over-wide piston-cylinder gap or serious abrasion, causing engine oil to flee upwards.
2. The piston ring sealing fails. Due to intensified abrasion, its radial elasticity decreases, and its radial gap, side gap and
rear gap become larger. In this case, you shall replace the piston ring.
3. Damaged or failing valve oil seal. This can cause a large amount of lubricating oil to flee into the combustion chamber.
In this case, you shall replace the valve oil seal.
4. Check valve cannot open rationally, failing in oil/gas separation.
5. Over-high engine temperature, excessive waste gas within the crankcase, over-high pressure within the cylinder head
cover, along with fresh air failing to flow smoothly within the PCV system.
In addition, the main reason for engine oil fleeing out is that the pressures within the crankcase and the cylinder head hood
are too high, thereby causing increased gap between sealing part and sealed part and decreased sealing part elasticity.
The fact that the part where the engine oil filter is connected is not tightly compressed, along with the fact that the sealing
gasket have no enough elasticity, are also a cause of engine oil leakage.
2. Use the oil level dipstick to drip a drop of engine oil onto a white filter paper. If the oil drop’s diffusion area is large and
its peripheral part’s color is light, then you can conclude that the engine oil has been diluted by fuel. If its central part
appears to be black, then it indicates that the engine oil has deteriorated. If its central part is brown, then this indicates that
the engine oil quality is normal.
IV. Excessive Engine Oil Consumption
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