Porcelain Marathon motor oil Enamel Sign 13 X 18 inches. The item “Porcelain Marathon motor oil Enamel Sign 13 X 18 inches” is in sale since Wednesday, July 31, 2019. This item is in the category “Collectibles\Advertising\Merchandise & Memorabilia\Signs\Original\1930-69″. The seller is “vintagetreasure15″ and is located in Kalyan Dombivli, Maharashtra. This item can be shipped worldwide.