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The average U.S. pump price of diesel exhaust fluid rose 7 cents to $2.77 a gallon in August from July, Integer Research reported.

U.S. truck stop operators added bulk DEF dispensers at 54 locations in August, bringing the total to 623, U.K.-based Integer said.

to $2.70 per gallon, the lowest level on record, following four straight months of rising prices.

The July the main ingredient in DEF.