Crude oil futures on Monday declined 0.63 per cent to Rs6,321 per barrel as participants trimmed their positions on low demand. On the Multi Commodity Exchange, crude oil for February delivery fell Rs40 or 0.63 per cent to Rs6,321 per barrel with a business volume of 7,466 lots. Globally, West Texas Intermediate crude oil traded 0.074 per cent lower at $76.27 per barrel, while Brent crude was trading 0.75 per cent down at $81.57 per barrel in New York.