SS San Flaviano was a 1950s British oil tanker owned by Eagle Oil and Shipping Company, a British subsidiary of Royal Dutch Shell. She was built by Cammell Laird in England in 1956 and attacked and sunk by the CIA in Borneo in 1958. San Flaviano had a sister ship, SS San Fortunato, built by Cammell Laird in the same year. The two ships were part of a substantial investment programme to renew Eagle Oil's fleet with larger and more modern tankers. Between 1950 and 1960 the company took delivery of at least 16 new tankers.