Continuing the upward streak, the prices of petrol and diesel hiked again on Monday, hitting an all-time high in Delhi, Mumbai, Kolkata and Chennai. Oil marketing companies (OMCs) increased fuel rates for the ninth consecutive day. A litre of petrol is selling at Rs. 79.15 in Delhi, Rs. 86.56 in Mumbai, Rs. 82.24 in Chennai and Rs. 82.06 in Kolkata. Diesel rates on Monday were hiked by 39 paise a litre, the steepest increase since the daily revision in prices was introduced in mid-june 2017.