As gasoline prices continue to rise, the national average price of diesel fell a few pennies for the fourth consecutive week.

For the week ending Monday, May 7, 2007, the average price of on-highway diesel fell 1.9 cents per gallon from $2.811 to $2.792 for a combination of ultra-low sulfur diesel and remaining low-sulfur diesel supplies, the U.S. Energy Information Administration reported.

The national average price of ULSD dropped 1.5 cents from $2.831 to $2.816, while low-sulfur diesel prices dropped an average of 3 cents from $2.746 to $2.716.

By region – seven out of nine regions showed price decreases – the biggest decrease for ULSD was 2.5 cents in the Lower Atlantic Region, where the price dropped from $2.798 to $2.773.

The East Coast region saw an average price of $2.813, down 1.6 cents from the previous price of $2.829.

ULSD averaged $2.743 per gallon in the Gulf Coast region, a decrease of 1.9 cents.

The West Coast region saw a 1.8-cent drop for ULSD, from $2.961 to $2.943.

ULSD in the Midwest Region averaged $2.779, down 1.5 cents from the previous price of $2.794.

Even California showed a decrease in average ULSD prices for three weeks in a row – 1.3 cents from $2.987 to $2.974.

The Central Atlantic region reported a decrease of six-tenths of a cent from $2.871 to $2.865 per gallon of ULSD.

The Rocky Mountain region had an increase of eight-tenths of a cent to crack the $3 mark for ULSD, going from $2.994 per gallon to $3.002.

ULSD in the New England region rose four-tenths of a cent from $2.868 to $2.865 per gallon.

Gasoline prices reported the previous week by the EIA showed a national average price of just under $3 per gallon with a trend heading upwards.