Diesel continued its six-week trend, losing 2.4 cents this week to land at a national average of $2.748

, according to the U.S. Department of Energy. Over the last six weeks, trucking's main fuel has fallen 6 cents. This is the largest drop since prices started going down in early November.

This week's average is about 32.6 cents higher than the national average during the same week last year, when it was at $2.422. Prior to the declines, diesel prices had gained 22.6 cents.

New England had the highest prices, averaging $2.870, followed by the Central Atlantic region, at $2.868. The lowest prices were found in the Lower Atlantic and Midwest regions, at $2.717 and $2.72, respectively.

Gasoline was down 3.5 cents from last week's national average of $2.634, settling at $2.599. This is 94 cents higher than last year.

Crude oil fell even lower than last week's two-month low, landing at $69.51 a barrel on the New York Mercantile Exchange Monday, according to the Associated Press. The news service attributes the drop to high oil supplies and weak demand. Last week, oil settled at $73.93 a barrel.