International Petroleum Products and Additives Co. has selected three distributors — Aspen Chemical Co., Superior Oil Co. and Young Chemical Co. — to market its lubricant additives and specialty chemicals in the United States.

IPAC, based in Dublin, Calif., announced last week that it will be represented in the Northeastern and Atlantic seaboard areas by Aspen Chemical Co. of Medford, N.J. Superior Oil Co.,in Indianapolis, Ind.,will represent IPAC in the central and northern Midwesternparts of the United States. Young Chemical Co., headquartered in Brook Park, Ohio, will represent IPAC in the Midwest.