on carbon 2 between 1 to 20 by weight of c 2 to c 6 carboxylic acids between 10 to 70 by weight of a non polar organic solvent and between 1 to 60 of polar organic solvent b dispersing an amount of calcium base sufficient to neutralize the acids in the mixture of step a and neutralizing the acids in the mixture with the calcium base c heating the neutralized composition at a temperature sufficient to evaporate the water in the mixture to a dried composition containing not more than 0 1 water d cooling the dried composition e overbasing the cooled dried composition by adding additional calcium base dispersed in polar solvent f carbonating the overbased mixture by sparging carbon dioxide gas through the mixture and g heating the carbonated product to remove water therefrom to a dryness of not more than 0 1 and part of the polar solvent in a preferred embodiment of the process of the present invention in above step b calcium oxide and or hydroxide with a molar equivalence to the carboxylic acids is reacted with at least two organic saturated carboxylic acids at a temperature of about 40 u00b0 c 90 u00b0 c wherein one of the acids is a short chain acid with a carbon number ranging from c 2 to c 6 in which the short chain acid is between 1 and 20 by weight of the total acid in the described preferred embodiment the saturated aliphatic c 7 to c 25 carboxylic.