New Delhi, April 24 -- Fuel retailers are losing Rs.20 per litre on petrol and Rs.100 a litre on diesel as state-run firms continue to shield consumers from oil price volatility by holding pump rates, an oil ministry official said on Thursday. Sector experts and industry executives, speaking on condition of anonymity, said such volatility could be unsustainable for oil refiners if the West Asia crisis prolongs and international oil prices remain above $70-80 a barrel. They expect oil companies to partially pass on their revenue losses on petrol and diesel to consumers sometime after assembly elections - the last round of voting in the state polls is on April 29 - if international oil price volatility continues. FULL REPORT ON P9...