ISLAMABAD/KARACHI: The caretaker government revised prices of petroleum products on Monday increasing the price of petrol by Rs4.26 per litre with effect from Tuesday, while dollar reached historic high against rupee.The revised price of petrol would be Rs91.96 per litre. The price of diesel has been increased by Rs6.55, while the price of light diesel has also been increased by Rs6.14.Diesel will now be retailed at Rs105.31 per litre while light diesel will be sold for Rs74.99 per litre....