Oil prices, today, went down again after the industrial body API reported a rise in US crude inventories last week, disregarding analyst speculations of a significant reduction. Brent futures were down by 0.4% and traded at $71.85 a barrel. West Texas Intermediate (WTI) crude was down by 0.5%, priced at $67.72. The US Department of Energy Information Administration will today release official numbers in this regard.