Aimed to protect and preserve the local environment and proactively manage the safety and health of the Tresauro oil field in Sicily, Italy a 8.4 km pipeline of crude oil was equipped with a fully leak detection system based on Brillouin distributed Fiber Optic technology. The pipeline is an 8” steel Duplex tube buried in the soil and served the transportation of the extracted oil from the 1500m depth wells of the Tresauro field to the refinery process plant located in in the city of Gela. The pipeline is monitored for crude oil leaks using a distributed fiber optic temperature sensing cable and a DTS station including DiTeSt DTS analyzer and DiView software to show results remotely and to trigger alerts into the operator DCS system in case of critical events.