National average diesel fuel prices were $3.47 per gallon as of October 4, 2021, according to the U.S. Energy Information Administration.
This is an increase from the last week of September when diesel fuel prices were $3.40 as of Sept. 27.
A year ago, diesel fuel prices were $2.38.
Current average diesel prices by region are:
East Coast: $3.43
Gulf Coast: $3.20
Rocky Mountain: $3.64
West Coast: $4.07
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