OLD SCHOOL POLARINE MOTOR OIL SIGN PORCELIN ADV 254-24 5FOOT X28IN SEE PHOTOS. The item “OLD SCHOOL POLARINE PORCELAIN MOTOR OIL SIGN” is in sale since Monday, June 17, 2019. This item is in the category “Collectibles\Advertising\Gas & Oil\Merchandise & Memorabilia\Signs”. The seller is “threemillerbears” and is located in Kansas City, Missouri. This item can be shipped to United States.