The U.S. average diesel fuel price increased less than 1 cent to $3.26 per gallon on May 31, 87 cents higher than a year ago. The Rocky Mountain price increased nearly 2 cents to $3.38 per gallon, the West Coast price increased more than 1 cent to $3.76 per gallon, and the East Coast price increased less than 1 cent, remaining virtually unchanged at $3.24 per gallon. The Midwest and Gulf Coast prices each decreased less than 1 cent, remaining virtually unchanged at $3.20 per gallon and $3.03 per gallon, respectively.
The U.S. average regular gasoline retail price increased nearly 1 cent to $3.03 per gallon on May 31, $1.05 higher than the same time last year. The Midwest price increased nearly 4 cents to $2.93 per gallon, the West Coast price increased nearly 3 cents to $3.72 per gallon, and the Rocky Mountain price increased more than 1 cent to $3.16 per gallon. The Gulf Coast price decreased more than 3 cents to $2.72 per gallon, and the East Coast price decreased nearly 1 cent, remaining virtually unchanged at $2.93 per gallon.
U.S. propane/propylene stocks increased by 4.1 million barrels last week to 48.2 million barrels as of May 28, 2021, 11.1 million barrels (18.7%) less than the five-year (2016-2020) average inventory levels for this same time of year. Gulf Coast, East Coast, Midwest, and Rocky Mountain/West Coast inventories increased by 2.1 million barrels, 1.2 million barrels, 0.7 million barrels, and 0.1 million barrels, respectively.