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Diesel fuel will average $3.79 a gallon this year, the Department of Energy said, lowering its most recent forecast by 11 cents.
The price will continue to fall into next year, to an average $3.58 in 2013, DOE said in its monthly short-term energy outlook, released Tuesday.
That’s down 21 cents from last month’s forecast. Trucking’s main fuel averaged $3.84 last year.
The department also lowered its price forecasts for both gasoline and crude oil. Gasoline will average $3.49 a gallon this year — down 7 cents from last month’s forecast.
It will fall even more, to $3.28 next year, down 23 cents from the June report. Gasoline averaged $3.53 in 2011.
The declines are largely due to “recent economic and financial news that points toward weaker economic outlooks could lead to lower economic growth forecasts,” the report said.