Brent crude futures fell more than 1 percent to USD 91.8 per barrel. You are using an outdated browser. Please upgrade your browser to improve your experience and security. Chennai Petroleum Corporation shares fell 3 per cent, while Oil India declined 1.4 per cent and ONGC was down 0.82 per cent. Mangalore Refinery and Petrochemicals (MRPL) slipped 1.5 per cent,.