R.I. Gen. Laws § 11-18-16: Sale of fuels and lubricants under false trademark or name — Adulteration.

It shall be unlawful for any person, firm, or corporation, to expose for sale, offer for sale, or sell under any trademark or trade name in general use, any liquid fuels, lubricating oils, or other like products, except those manufactured or distributed by the manufacturer or distributor marketing liquid fuels, lubricating oils, or other like products, under the trademark or trade name, or to substitute, mix, or adulterate, the liquid fuels, lubricating oils, or other similar products, sold, offered for sale, or distributed, under the trademark or trade name.