S.C. Code Ann. § 39-41-10

"Petroleum" or "petroleum product" as used in this article means gasoline, gasohol, kerosene, diesel fuels, jet fuels, fuel oil no. 1 through 4, or a similar product of petroleum or a product which may be acceptable for use as a petroleum product or oxygenated compound blends of the products but does not include compressed natural gas or propane when dispensed or sold as a motor vehicle fuel.