U.S. Pat. No. 4,133,779 discloses liquid detergent compositions for removing grease soil comprising a water soluble semi polar detergent--a tri-alkyl amine oxide or phosphine oxide or a dialkyl sulfoxide--and a magnesium or calcium salt of a detergent selected from a group including alkyl benzene sulfonates, alkyl sulfates, alkyl ethenoxy ether sulfates and mixtures thereof.