Fuel Economy

The summer spiral for U.S. highway fuel prices finally came to an end. After 10 straight weeks of declines, diesel and gasoline pump prices inched up a bit as autumn began.

The U.S. diesel price decline marks 10 weeks, while gas prices have declined for nine. Diesel is nearly $1 cheaper than a year ago; gas is down 70 cents.

The U.S. diesel price average has continued to drop for the ninth week in a row, while the gas price average has been falling for about eight weeks.

The West Coast saw jumps in both gas and diesel prices, although the national average for both fuel types continued their fall, with diesel at $3.625/gal and gas at $3.289/gal...