>>>The US government's military is using diesel like there's no tomorrow (for example the US Army has no gasoline tactical vehicles today) and the requirement for low-sulphur diesel has raised the cost of production.<<<
The military is not driving diesel prices. The US Military represents less than 2% of the United States fuel usage. Moreover, this war has been going on for 5 years. The highest fuel usage would have been during mobilization at the beginning. Nothing has happened in the last several months that would have increased military diesel usage from what it has been for 5 years!
Diesel prices are not driven by the same market forces as gasoline and the movement in their respective prices is not directly comparable. Have other petroleum-based products come down in price along with gasoline - i.e. plastics, lubricants, roofing shingles, candles, etc.