Ultra low phosphorus lubricant compositions

A low-phosphorus lubricating composition having less than 600 ppm phosphorus, comprising at least 85 weight % of a lubricating base blend, and an additive comprising the following, as weight % of the total composition:

• (1) an organomolybdenum component comprising:
• (a) an organomolybdenum complex prepared by reacting about 1 mole of fatty oil, about 1.0 to 2.5 moles of diethanolamine and a molybdenum source sufficient to yield about 0.1 to 12.0 percent of molybdenum, which organomolybdenum complex is present at an amount which provides about 400 ppm Mo, and
• (b) a molybdenum dithiocarbamate present at an amount which provides about 300 ppm Mo,
• the organomolybdenum component being present at an amount which provides about 700 ppm Mo;
• (2) a hindered phenol component being (iso-octyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), at about 1.25-1.5%;
• (3) a dithiocarbamate component consisting of (a) about 0.4% of methylene-bis-dialkyldithiocarbamate and (b) said molybdenum dithiocarbamate, at a total dithiocarbamate component of about 1.0%;
• and
• (4) an alkylated diphenyl amine, at about 0.5-0.75%.