Government-run oil marketing companies reduced on Friday the retail prices of petrol and diesel by Rs. 2.43 per br br litre and Rs. 3.60 per litre, respectively, in the third reduction in rates this month. br br With this change, the price of petrol in Delhi will become Rs 64.47litre -- down from Rs 66.90litre. The new br br diesel price will be Rs. 46.12litre compared with the previous rate of Rs 49.72 litre.