How to Identify the Quality of Engine Oil?

[MadisonMarie]

Methods to identify the quality of engine oil are as follows: 1. Observe the color of the oil: Domestic genuine bulk engine oil is mostly light blue with a bright luster and uniform flow. Imported engine oil is golden with a slight blue tint, crystal clear and transparent, with exquisitely crafted oil cans, clear and neat edges of patterns and codes, and no color leakage or overlapping; otherwise, it is counterfeit. 2. Smell the odor: Qualified engine oil should have no special odor, only a slight fragrance. Any engine oil that has a strong olfactory stimulation and abnormal odor is deteriorated or inferior oil and must not be used. 3. Oil drop test: Drop a drop of oil from the oil pan onto white paper. If the black spot in the center of the oil drop is large, black-brown, uniform, and free of particles, with a small yellow infiltration around it, it indicates that the oil has deteriorated and should be replaced. If the black spot in the center of the oil drop is small and light in color, with a larger yellow infiltration trace around it, it indicates that the oil can still be used.