Petrol Hike... where is my understanding Wrong ??

Why are the only public sector oil refining companies bleeding all time? They are inefficient. The crude cost is only one part of the petrol cost, what about cost of refining and distribution etc? Our refineries are old and machinery fully depreciated. Why is our cost so high? It is a mischief to compare rates with those in some other countries. Even in USA, petrol is cheaper than in India,not even considering purchase price parity.The dollar has depreciated more than 15% since last one year, that has brought down the import bill. What about our own crude resources in Bombay High etc? What is ONGC giving the country? Do we have to pay the cost of imported crude even for our own national wealth? Is the production by ONGC insignificant? How come then it is one of the largest corporations?Many questions, but only answer given is oil companies are losing money.What a damned shame and what a mess the politicians and the public sectors have created here. But Reliance has never ever come up with such losses ? have they... May be i am note sure. *

When Mr.Chidambaram brought service taxes & (VAT) , he said nothing to worry, the tax is limited to limited services. In subsequent budgets his stands changed. Are they any differnt from what britishers did to us??

*am a Kid to Business world !

Note:
To my knowledge a Typcial crude oil refineries produces LPG, Gasoline, Kerosene, Diesel, Fuel oil, Lubricating oil, Paraffin wax, Asphalt and Tar as products...Even the residues are produced as Tar ! Even then why is this loss & High price ?..... The key answer is the DEMAND is going Higgggghhhhhh day by day. :-)