| http://www.w3.org/ns/prov#value | - It has now been found that improved oil soluble dispersant additives, useful in fuel and lubricating oil compositions, including concentrates containing the additives, can be prepared by first reacting a C5 -C9 lactone with either a polyamine, a polyol or an amino alcohol to form an intermediate adduct, and then reacting the intermediate adduct with a carboxylic acylating agent which contains at l
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