Diesel Drops 2.3¢ in Fifth Straight Decline

A Gallon Now Costs $3.626
Tank trucks fueling at an oil refinery
Tank trucks take on fuel at a Marathon oil refinery in Salt Lake City. The cost of trucking's main fuel has dropped a total of 10.8 cents over the past five weeks. (George Frey/Bloomberg News)

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The national average price of diesel slid 2.3 cents to $3.626 a gallon in the fifth consecutive decline, according to Energy Information Administration data released Dec. 20.


• The cost of a gallon of diesel has shed 10.8 cents since reaching its 2021 high of $3.734 on Nov. 15.

• Trucking’s main fuel now costs $1.007 more than it did at this time in 2020.

• All 10 regions in EIA’s weekly survey reported decreases, with the most significant drop being 3.3 cents a gallon along the Gulf Coast. The smallest dip was seven-tenths of a cent in California.

• Gasoline, meanwhile, also continued its downward trend, dipping 2 cents to $3.295 a gallon.

On-Highway Diesel Fuel Prices

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