Oil tumbled as a government report showed U.S. crude and fuel inventories ballooned by the most in almost 30 years, feeding fears of an oversupply just as international trade disputes threaten demand. Futures slid as much as 4.2% in New York after the U.S. Energy Information Administration said total stockpiles grew by about 22 million barrels last week, the biggest jump in data going back to 1990. A 6.77 million-barrel increase in crude inventories was almost double the gain seen in an American Petroleum Institute report on Tuesday. West Texas Intermediate futures for July delivery fell $2...