The national average cost of diesel has dropped since last week, according to AAA.
AAA reports that on July 12, the national average cost for a gallon of diesel has dropped from $5.726 a week ago to $5.625 today.
The cost of a gallon of diesel on July 12 is the highest in California at $6.787 per gallon. The state where diesel is cheapest is Texas, where the average cost for diesel is...
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