High Quality Content by WIKIPEDIA articles! The SS Ohio was an oil tanker built for the Texas Oil Company (now Texaco); she was the largest oil tanker in the world when she was built. The tanker was launched on April 20, 1940 at the Sun Shipbuilding Yard in Chester, Pennsylvania, USA. SS Ohio was capable of doing over 16 knots (30 km/h) at sea. The tanker would end up bound in the struggle for the re-supply of the island fortress of Malta, during the Second World War.