Mangalore Refinery and Petrochemicals Ltd, a subsidiary of the state-owned gas major ONGC, has stepped up the implementation of its Rs 600-crore investment plan to produce Euro-IV fuel by 2007, much ahead of the national fuel policy deadline of 2010. In pursuit of this, MRPL is to invest Rs 100-crore for creating off-site storage facilities and another Rs 150-crore on product value addition during the next two years, said an ONGC official in the know of plans at the subisidary.