Lubricating composition

A lubricating composition comprising a base oil as a lubricant and the following components as additives:

• a component (A) comprising at least one molybdenum compound selected from the group consisting of sulfurized oxymolybdenum dithiocarbamates represented by the following general formula:
• ##STR18## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independent hydrocarbyl groups, and X.sup.1 represents an oxygen or sulfur atom;
• sulfurized oxymolybdenum dithiophosphates represented by the following general formula:
• ##STR19## wherein R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are independent hydrocarbyl groups, and X.sup.2 represents an oxygen or sulfur atom;
• and
• molybdenum amine compounds obtained by reacting a hexavalent molybdenum compound with an amine compound represented by the following general formula:
• ##STR20## wherein both R.sup.9 and R.sup.10 represent a hydrogen atom and/or hydrocarbyl group, and R.sup.9 and R.sup.10 are not hydrogen atoms at the same time:
• a component (B) comprising a glycerin ether represented by the following general formula:
• ##STR21## wherein both R.sup.11 and R.sup.12 represent a hydrogen atom and/or hydrocarbyl group, R.sup.11 and R.sup.12 are not hydrogen atoms at the same time, and n ranges from 1 to 10;
• and/or
• an oxyalkylene glycol monoalkyl ether represented by the following general formula:
• R.sup.13 O--(R.sup.14 --O--).sub.m H (5)
• wherein R.sup.13 represents a C.sub.12 -C.sub.20 hydrocarbon group, R.sup.14 represents an alkylene group, and m ranges from 1 to 10 and
• a component (C) comprising a zinc dithiophosphate represented by the following general formula:
• ##STR22## wherein a represents a figure of zero or one-third, and both R.sup.15 and R.sup.16 represent a hydrocarbyl group and/or
• a zinc dithiocarbamates represented by the following general formula:
• ##STR23## wherein both R.sup.17 and R.sup.18 represent a hydrocarbyl group wherein component (B) is present in an oil soluble and friction reducing amount.