What Color of Engine Oil Needs to Be Replaced?
1 Answers
According to the color of the engine oil, the method to determine whether it needs to be replaced is as follows: 1. Sediment Ring: The center of the spot is where the coarse particle impurities in the oil are concentrated. The depth of the sediment ring's color can roughly indicate the degree of oil contamination. 2. Diffusion Ring: The ring around the sediment ring is called the diffusion ring, which is the trace left by the fine particle impurities suspended in the oil diffusing outward. The finer the particles, the farther they diffuse. The width of the diffusion ring and the uniformity of its color are important factors, indicating the dispersing ability of the additives in the oil against contaminants. 3. Oil Ring: The outer ring of the diffusion ring is the oil ring, with colors ranging from light yellow to brownish-red, indicating the degree of oil oxidation. Level 1: There is no clear boundary between the sediment area and the diffusion area of the oil spot. The entire oil spot is uniform in color, with a light and bright oil ring, indicating good oil quality. Level 2: The sediment ring is dark in color, the diffusion ring is relatively wide, with a clear boundary. The oil ring is yellow in varying shades, indicating the oil is contaminated but still usable. Level 3: The sediment ring is deep black, with dense sediment, a narrow diffusion ring, and a darkened oil ring, indicating the oil has deteriorated. Level 4: Only the central sediment ring and oil ring are present, with no diffusion ring. The sediment ring is pitch black, with dense and thick sediment that does not dry easily. The oil ring is deep yellow or light brown, indicating the oil has oxidized and deteriorated.
