"Recycled oil" means:
(a) used oil from which physical and chemical contaminants acquired through use have been removed by re-refining or other processing, or(b) any blend of oil, consisting of such re-refined or otherwise processed used oil and new oil or additives with respect to which the manufacturer has determined, pursuant to the rule prescribed under Title V, Section 383 of the Federal "Energy Policy and Conservation Act" ( P.L. 94-163) and promulgated by the Federal Trade Commission, is substantially equivalent to new oil for a particular end use.