Polyol ester compositions with unconverted hydroxyl groups for use as lubricant base stocks

A lubricant oil which is prepared from:

• at least one synthetic ester composition exhibiting increased thermal and oxidative stability versus fully esterified compositions, said synthetic ester composition comprises the reaction product of:
• a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2;
• and at least one linear acid which has a carbon number in the range between about C.sub.5 to C.sub.10 or a mixture thereof with a C.sub.12 linear acid;
• wherein said synthetic ester composition has a hydroxyl number of between about greater than 5 to 100;
• and
• a lubricant additive package.

A synthetic ester composition exhibiting increased thermal and oxidative stability versus fully esterified compositions, said synthetic ester composition comprises the reaction product of:

• a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2;
• and
• at least one branched acid which has a carbon number in the range between about C.sub.4 to C.sub.20 ;
• wherein said synthetic ester composition has a hydroxyl number of between about greater than 5 to 100.

A lubricant oil which is prepared from:

• at least one synthetic ester composition exhibiting increased thermal and oxidative stability versus fully esterified compositions, said synthetic ester composition comprises the reaction product of:
• a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2;
• and at least one branched acid which has a carbon number in the range between about C.sub.4 to C.sub.20 ;
• wherein said synthetic ester composition has a hydroxyl number of between about greater than 5 to 100;
• and
• a lubricant additive package.