Last week, the national price of diesel increased to an average of $4.142 per gallon, the highest price since the last week of August 2008. The average cost per gallon increased by 1.9 cents as oil prices rose to more than $107 per barrel. The average price is 2.6 cents higher than the same period in 2011.
The price bump was the highest in the Rocky Mountain region, where prices rose 5 cents to $4.119 per gallon. Prices increased in all regions except for California, where the diesel price per gallon remained at $4.481.