Hi Jim,
For what it is worth: I was quoted $1.99/gal for diesel/fuel oil for Friday delivery (Northern Virginia) from the terminal, and since it looks like prices will be heading up from here, I am filling all of my reserve tanks. After several hours of study, I decided to go with FPPF Super Fuel Storage Stabilizer and FPPF KILLEM (rather than PRI-D or Stanadyne products) in 32 ounce bottles to protect my investment. The best price I found via mail order was from Fleet Source in New Jersey and Pennsylvania. Delivered cost: $126 for enough to treat 4,000 gallons.
I hope this is useful information for your other readers. Thank you so very much for your wonderful work! Happy New Year! – Scott in Northern Virginia