A leader in sustainable energy solutions that collects used waste oil and turns it into crystal-clear Re-refined Base Oil. We, Gulf Solvents are building a Group II/III Base Oil Re-refinery in Saudi Arabia. The company will have a first-mover advantage as presently the Kingdom of Saudi Arabia has no Group II/III Re-refiners. Gulf Solvent’s Technology for Re-refining is based on vacuum distillation (using Wiped Film Evaporation) and Hydrotreating (also known as Hydro finishing).