Average prices in all regions rose in the latest week. The biggest gain of 3.3 cents to $4.038 was on the West Coast, followed by 3.1 cents to $4.145 in California and 3.1 cents to $3.913 on the Gulf Coast.
The national average price is $1.03 higher than a year ago. The record diesel price was $4.764 in July 2008.
For diesel price information, click here.