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The U.S. average for retail diesel fuel rose for a third straight week, hitting $2.854 per gallon after a 4.3-cent jump May 4, the Department of Energy reported.

Diesel’s national average price rose 3.1 cents to $2.811 a gallon, the second consecutive increase, while gasoline jumped to a five-month high, the Department of Energy reported April 27.

The Minnesota Trucking Association and four trade groups are suing Minnesota in federal court in an attempt to topple the state’s biodiesel mandate.

Diesel’s national average price rose 2.6 cents to $2.78 a gallon, the first gain in six weeks, as oil prices held near their highest level this year, the Department of Energy reported April 20.

Diesel’s national average price fell to the lowest level since 2009, dropping 3 cents to $2.754 a gallon, the Department of Energy reported April 13.

The Department of Energy lowered its 2015 forecast for diesel prices by 3 cents to $2.86 a gallon and said it will average $2.77 for the six months through September.

Diesel’s national average price fell 4 cents for a second straight week, to $2.784 a gallon, while gasoline took its biggest drop since January, the Department of Energy reported April 6.

Diesel’s national average retail price fell for a third straight week, dropping 4 cents to a five-year-low $2.824 a gallon, the Department of Energy reported March 30.