Normal brown and blue-black. Milk was yellow, it indicates that blended with diesel oil or water, should be replaced. Dark black, it indicates that the oil has gone bad, must be promptly replaced.
Unknown origin oil, stir after drops on white paper (preferably filter paper), the formation of oil spots, oil spots after about 2 to 3 hours gradually spread outward from the center, forming three concentric rings. According to the color of the three regions, the width and shape can distinguish oil state.
Remove from the oil low shell in a little oil, painted on the fingers, with your fingers and thumb twist mill. If you feel that oil impurities like water no sticky feeling, even astringent or sour taste, oil has changed. If you twist mill finger to see small shiny metal grinding, serious engine wear parts, also shows that the oil must be immediately replaced.
Normal brown and blue-black. Milk was yellow, it indicates that blended with diesel oil or water, should be replaced. Dark black, it indicates that the oil has gone bad, must be promptly replaced.
Unknown origin oil, stir after drops on white paper (preferably filter paper), the formation of oil spots, oil spots after about 2 to 3 hours gradually spread outward from the center, forming three concentric rings. According to the color of the three regions, the width and shape can distinguish oil state.
Remove from the oil low shell in a little oil, painted on the fingers, with your fingers and thumb twist mill. If you feel that oil impurities like water no sticky feeling, even astringent or sour taste, oil has changed. If you twist mill finger to see small shiny metal grinding, serious engine wear parts, also shows that the oil must be immediately replaced.


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