Oilzum Motor Oil porcelain sign is a true gem for any collector of oil & gas memorabilia. Add a piece of old school racing to your collection with this vintage Oilzum Motor Oil Sign. This 12 porcelain gas sign boasts a colorful design with green, orange and yellow colors. Whether you are displaying it in your home, shop, bar, or garage, or giving it as a gift, you can also browse my other auctions for more gas, oil, aviation, automobile, motorcycle, and hunting signs. Vintage Oilzum porcelain sign. Race Cars with Oilzum graphic at the top. 12 inches in diameter. Bright colors w/ porcelain on both sides.