Outside of not changing at all, the smallest amount the weekly Department of Energy/Energy Information Administration retail diesel price can move is one-tenth of one cent.
And that’s how much it went down effective Monday: 0.1 cent per gallon, to $3.372.
The small move means that since the weekly price posted June 28, the benchmark price for fuel surcharges has moved in a tight range. On June 28, the price moved up 1.3 cents to $3.30 a gallon. Since that time, it has been as high as $3.373 —...
https://www.freightwaves.com/news/doe-eia-diesel-price-is-down-by-as-little-as-possible