The U.S. average diesel fuel price increased nearly 4 cents to $3.28 per gallon on May 21, 2018, 74 cents higher than a year ago. Midwest and Gulf Coast prices each rose over four cents to $3.22 per gallon and $3.06 per gallon, respectively, East Coast prices rose nearly four cents to $3.27 per gallon, and West Coast and Rocky Mountain prices each rose over three cents to $3.77 per gallon and $3.35 per gallon, respectively.
The U.S. average regular gasoline retail price increased 5 cents from last week to $2.92 per gallon on May 21, 2018, up 52 cents from the same time last year. Midwest prices increased nearly seven cents to $2.85 per gallon, Gulf Coast prices increased over six cents to $2.68 per gallon, Rocky Mountain prices increased nearly five cents to $2.97 per gallon, East Coast prices increased four cents to $2.86 per gallon, and West Coast prices increased three cents to $3.44 per gallon.
U.S. propane/propylene stocks increased by 0.7 million barrels last week to 41.1 million barrels as of May 18, 2018, 13.5 million barrels (24.7%) lower than the five-year average inventory level for this same time of year. Midwest and Rocky Mountain/West Coast inventories increased by 1.1 million barrels and 0.3 million barrels, respectively, while Gulf Coast and East Coast inventories decreased by 0.5 million barrels and 0.1 million barrels, respectively. Propylene non-fuel-use inventories represented 6.8% of total propane/propylene inventories.