Petrol and diesel prices were hiked in metros on Saturday, marking the seventh straight day of increase since state-owned oil companies returned to the normal practice of daily reviews following a 12-week pause. With effect from 6 am, the prices of petrol was increased by 59 paise per litre and diesel by 58 paise per litre in Delhi. While the price of petrol was revised to Rs 75.16 per litre in the national capital from Rs 74.57 per litre the previous day, the diesel rate was increased to Rs 73.39 per litre from Rs 72.81 per litre, according to notifications from state-run Indian Oil Corporation, the country's largest fuel retailer.