TYDOL MOTOR OIL PORCELAINSIGN. THIS PIECE IS SUCH A GREAT PETROLIANA SIGN AND ONE OF MY FAVORITES BEING A FAN OF TYDOL/FLYING A. IT MEASURES 30 DIAMETER, DOUBLE SIDED.. DECENT COLORS AND GLOSS… THIS IS AN EARLY SIGN DATING TO THE 1930s. The item “Original TYDOL Ethyl Motor Oil Porcelain Gas Sign” is in sale since Monday, March 4, 2019. This item is in the category “Collectibles\Advertising\Gas & Oil\Merchandise & Memorabilia\Signs”. The seller is “redhotrelics” and is located in Elmwood Park, New Jersey. This item can be shipped to United States.