Political tension between the U.S. and Iran met increased crude supplies from Russia, Saudi Arabia and other OPEC members just as average U.S. diesel fuel prices dropped almost 2 cents from the week before. Diesel prices, nevertheless, remain 71 cents higher than a year earlier.
The national average on-highway diesel retail price, as reported by the Department of Energy on July 23, was $3.22 per gallon.
Prices fell in all regions, with the biggest drop in the Midwest, down 2.9 cents per gallon to $3.142. The highest prices were in California, at $3.943, down 2.5 cents, and the lowest were in the Gulf Coast region, which slipped to $2.993 per gallon.