Retail fuel prices in India continue to burn a hole in pockets, with the cost of petrol increasing for a 15th consecutive day on Monday to touch a new high of Rs 78.27 a litre in Delhi, up from Rs 78.12 per litre a day before. This, incidentally, happened on a day when the global crude oil price showed a decrease. On Monday, petrol prices in Mumbai stood at Rs 86.08 a litre, in Kolkata Rs 80.76 and in Chennai Rs 81.11. In line with petrol, diesel prices also increased -- to Rs 69.17 per litre in Delhi and Rs 73.64