improving the viscosity and lubricity of the oil. additionally, they are used to protect engines from corrosion, extend the service life of the oil, and dissolve and disperse harmful sludge. the need to reduce vehicular emissions and to increase fuel economy has led to the development of lubricating oils...
chemically defined; preparations as specified in note to this chapter based on synthetic organic colouring matter; synthetic organic products of a kind used as fluorescent brightening agents or as lumin ₹ ₹ ₹ ₹ footwear with outer soles of rubber, plastics, leather or composition leather and uppers...