"Mixtures of different types of phenols or amines are particularly preferred. [0095] The preferred sulfur compounds which are optionally added to compositions according to the present invention for improved antioxidant performance include the dialkyl sulfides such as dibenzyl sulfide, polysulfides, diaryl sulfides, modified thiols, mercaptobenzimidazoles, thiophene derivatives, xanthogenates, and t" . . . .