Petrol and diesel prices were increased by oil marketing companies on Saturday as global oil prices remained firm, reaching its highest levels this fiscal.Petrol prices increased by 24 paise to Rs 82.13 per litre on Saturday from Rs 81.89 per litre the previous day.Diesel prices, on the other hand, increased by a higher margin of 27 paise to Rs 72.13 a litre, up from Rs 71.86 a litre on Friday. Oil companies began increasing pump prices of the two petroleum products from last Friday after a nearly two-month-long hiatus in fuel price revision.