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Lubricating oil

  • US 20060105921A1
  • Filed: 10/31/2003
  • Published: 05/18/2006
  • Est. Priority Date: 11/05/2002
  • Status: Abandoned Application
First Claim
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1. A lubricating oil composition which is obtained by incorporating, into (A) a lubricant base oil comprising a mineral oil, a synthetic oil or a mixture thereof, (B) a nitrogen-containing compound having at least one alkyl group or alkenyl group having a number-average molecular weight of 900 or more and/or a derivative thereof in an amount of 0.01 to 0.20% by mass in terms of the content of nitrogen of the total of the composition, and (C) a viscosity index improver having a weight-average molecular weight of 40,000 or less, so as to set the viscosity index of the composition to 160 or more and set the kinematic viscosity of the composition into the range of 20 to 30 mm2/s at 40°

  • C.

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