New Delhi: Fearing oil refineries will be hit hard by the Finance Ministry's move to change the way petrol and diesel are priced, Oil Minister M Veerappa Moily has asked Prime Minister Manmohan Singh to constitute an expert committee to decide on the issue.

The Finance Ministry has informed the Petroleum Ministry that auto fuel needs to be priced at export parity rather than import parity as the 2.5 per cent customs duty was adding to the under-recoveries of the state-run oil marketing companies without contributing any revenue to the exchequer.