A day after BPCL raised petrol prices, state-run Indian Oil Corp (IOC), the nation's largest fuel retailer, on Wednesday hiked petrol prices by 2 rupees 96 paisa per litre effective from Wednesday midnight. A company official said, petrol at IOC pumps in Delhi will now cost 55 rupees 87 paisa per litre.The biggest hike in six months follows international crude oil prices climbing to 90 dollars per barrel. Bharat Petroleum Corp Ltd (BPCL) had on Tuesday announced a hike of 2 rupees 95 paisa per litre in petrol prices in Delhi, with effect from Wednesday. Hindustan Petroleum Corp Ltd (HPCL), the third state fuel retailer, also hiked petrol prices by 2 rupees 94 paisa per litre effective Wednesday midnight.