U.S. crude oil inventories likely increased last week with refineries running at a slightly slower pace, while product stocks are expected to have declined, according to a survey by The Wall Street Journal.

Oil futures add to the previous day's losses as the market frets about the effect that U.S. trade tariffs could have on economic growth and oil demand. An unexpected 2.3 million barrel draw in U.S. crude stocks for last week does little for prices,