R.I. Gen. Laws § 23-19.6-8: Sale of recycled oil products.

A person may represent any product made in whole or in part from used oil to be substantially equivalent to a product made from new oil for a particular end use, if substantial equivalency has been determined in accordance with rules prescribed by the federal trade commission under the federal Energy Policy and Conservation Act, 42 U.S.C. § 6201 et seq., or if the product conforms fully with the specifications applicable to that product made from new oil.