... requirement for formulating middle-class engine oil.Special features1.Sulfonic acid content: 57%2.Major composition: dialkyl benzenesulfonic acid3. ... property.Characteristics ItemTypical valueDensity (20°C), (GB/T1884), kg/m3960Sulfonic acid content, (Q/JTH011, Affix A), m%57TAN, (Q/JTH011 ... , Affix A), mgKOH/g105Free acid, (Q/JTH011, Affix A), m% 2.3The enterprise standard ...