Crude stocks increased by 4.1 million barrels for the week ending April 5 to 455.8 million barrels, compared to analysts' expectations for an increase of 2.3 million barrels.
The institute said that crude stockpiles at the delivery center in Cushing, Oklahoma, fell 1.3 million barrels.
While the Petroleum Institute data indicated that the refineries consumption rates of crude increased by 264 thousand barrels per day.
Gasoline stocks fell 7.1 million barrels, compared to analysts' expectations in a Reuters poll that two million barrels will drop. p>
The institute data showed that distillate stocks, which include diesel and heating oil, decreased by 2.4 million barrels, compared to expectations for a drop of 1.3 million barrels.
US imports of crude increased last week by 294 thousand barrels per day to 7.2 million barrels per day.
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