an article of manufacture comprising , as a first component , a plurality of electrical conductors , each surrounded by one or more layers comprising a mixture of one or more polyolefins ; a first antioxidant selected from the group consisting of poly ; the reaction product of diphenylamine and acetone ; the reaction product of diphenylamine , acetone , and formaldehyde ; and mixtures thereof ; and a second antioxidant selected from the group consisting of 2 , 2 &# 39 ;- oxalyldiamidobis ethyl - 3 -- propionate ! ; 1 , 2 - bis - hydrazine ; and mixtures thereof ; and , as a second component , hydrocarbon cable filler grease within the interstices between said surrounded conductors .