According to a quasi-lattice model, a simple equation for predicting the interfacial tensions of binary systems from UNIQUAC parameters and mutual solubility data has been obtained.

DMC, which has advantages of high oxygen contents, high boiling point and good mutual solubility with diesel fuel, is very suitable to be used as fuel additive.

Said invention uses the mutual solubility of the detergent and greasy dirt on the oil-smoke exhauster to remove greasy dirt.