State-owned fuel retailers are losing close to Rs 3 per litre on selling diesel while the profit on petrol has trimmed due to recent firming up in international oil prices, industry officials said detailing reasons for continuing to hold retail prices. Indian Oil Corporation (IOC), Bharat Petroleum Corporation Ltd (BPCL) and Hindustan Petroleum Corporation Ltd (HPCL), who control roughly 90 per cent of India’s fuel market, ‘voluntarily’ have not changed petrol, diesel and cooking gas (LPG) prices for almost two years now, resulting in losses when input cost was higher and profits when raw material prices were lower.