It is a strange situation that defies the data to me. According to the EIA weekly petroleum report for diesel and compared to last year at this same time:
Fuel oil prices have nearly doubled
Diesel prices are up a mere 50 to 69%
Stocks are about 20% below the five year average
Refinery production of distillate is UP about 6%
Imports are down slightly
Exports are up slightly so the net of exports and imports is about 200,000 bbls per day less distillate in the US just ab out offsetting the increase in refinery production.
Demand is just about flat with last year.
Overall: stocks are down, net of production and demand is about flat with last year and YET prices have gone up considerably.
WHY?
Source: https://www.eia.gov/petroleum/weekly/distillate.php
BTW, propane prices are flat or slightly lower compared with last year.
https://www.eia.gov/petroleum/weekly/propane.php