Petrol and diesel prices have marginally increased from Friday midnight consequent to a corresponding hike in the commission for petroleum dealers by the Union Ministry of Petroleum and Natural Gas. Revision In the city, the increase of three paise on petrol, taking the retail price of a litre of the fuel to Rs.49.64 and four paise on diesel, resulting in the price going up to Rs.34.44, however, has not cheered the dealers. They complained that the quantum of the upward revision of commission fell short of their expectations. Protest