BP has officially completed a $60 million upgrade of its Kwinana oil refinery (pictured) that is designed to deliver cleaner diesel fuel. The project involved construction of a ‘hydrotreater’, in which naturally occurring sulphur is separated from the diesel. The new diesel will have a maximum sulphur content of 50 parts per million, or one tenth of the current legal maximum. As well as burning more cleanly, the new diesel is expected to enable the introduction of more efficient diesel engines.BP Australasia president Gerry Hueston said the project was an example of government and industry working together. “BP with its desire to improve environmental outcomes and deliver better fuels; and a government introducing measured, sensible incentives and regulations to create the environment for investment to take place,” he said.