S.C. Code Ann. § 39-41-310: Lubricating oil, unauthorized provision.

It shall be unlawful for any person to fill with a spurious or substitute article an order for lubricating oil for internal combustion engines of automobiles, autotrucks or tractors, if such oil ordered is designated by a trademark or distinctive trade name unless and until it is explained to the person giving the order that the article offered is not the article that he ordered and the purchaser shall thereupon elect to take the substitute article that is being offered to him.