A rally for on-highway diesel prices has ended with the average cost of the fuel falling for the first in more than a month, according to the latest weekly...

The national average cost of on-highway diesel has moved higher for the second straight week, while gasoline is at its highest level in more than a year.

Diesel prices continued their recent and steep decline into the New Year, aided by oil prices that are the lowest in nearly six years.

The average price of diesel has moved lower for the fifth straight week and is at it lowest level in just over two months, but gasoline has posted its 10th...

UPDATED -- The average cost of on-highway diesel has moved slightly lower over the past week, following two straight weekly increases, according to a new...

In a speech Tuesday calling for tougher emissions for coal-fired power plants, President Obama also laid out what he wants when it comes to emissions from...

After falling for 10 straight weeks, the average U.S. cost of diesel has done an about-face. Gasoline is higher for the second straight week but oil is...

Since the summer, the price of oil has plummeted 50 percent, hitting its lowest level in more than five years about a week before Christmas. Diesel has...

A group dedicated to the development of a market for natural gas powered vehicles has issued a call to action over possible changes in the way compressed...

UPDATED -- Diesel fuel and gasoline prices in the U.S. continue moving lower with the national averages posting their largest weekly drops in quite a while.