State-owned Indian Oil Corporation (IOC) has made an investment of around Rs 3,000 crore to upgrade its refinery at Haldia to meet BS-VI emission norms, an official said on Thursday.
The oil marketing PSU will invest another Rs 388 crore for setting up a grassroot bottling plant at Kharagpur, diesel exhaust fluid (DEF) plant at Budge Budge and lube blending unit at Paharpur in West Bengal.
