Patent ID: 8030259

Claim:
A composition consisting essentially of A) An additive mixture consisting essentially of a) At least one compound: wherein one of R 1 and R 2 independently of one another represents hydrogen or a hydrocarbon radical selected from the group consisting of branched nonyl, 1-phenylethyl and 2-phenyl-2-propyl and the other one represents a hydrocarbon radical selected from the group consisting of branched nonyl, 1-phenylethyl and 2-phenyl-2-propyl; and b) At least one compound: wherein R 1 and R 2 independently of one another represent hydrogen or a hydrocarbon radical selected from the group consisting of tert-butyl, branched octyl, branched nonyl, 1-phenylethyl and 2-phenyl-2-propyl; and R 3 represents a hydrocarbon radical selected from the group consisting of tert-butyl, branched octyl, branched nonyl, 1-phenylethyl and 2-phenyl-2-propyl; and B) A base oil of lubricating viscosity which is susceptible to oxidative, thermal or light induced degradation.