No person shall knowingly expose or offer for sale or sell a petroleum product of a manufacturer or distributor that has been mixed, blended or compounded with the products of other manufacturers or distributors under the trade name, trademark or

name or other distinguishing mark of either of the manufacturers or distributors or as the unadulterated product of a manufacturer or distributor. Nothing in this section shall prevent the lawful owner from applying his own trademark, trade name or symbol to any product or material.