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Synergistic lubricating oil composition containing a mixture of a benzo[b]perhydroheterocyclic arylamine and a diarylamine

  • US 7,501,386 B2
  • Filed: 12/21/2005
  • Issued: 03/10/2009
  • Est. Priority Date: 12/21/2005
  • Status: Active Grant
First Claim
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1. A composition comprising a lubricating oil and a synergistic mixture of antioxidants, said mixture comprisinga) from 0.1 to 10 weight percent of a first antioxidant according to formula I:

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