Fuel volume drives valuation more than any other single number
Gallons per month is the headline. Diesel volume separates real truck stops from glorified convenience stores. A genuine truck stop pumps 200,000–800,000 gallons of diesel per month; a roadside diesel pump pumps 30,000. Fuel margins are thin (5–15 cents per gallon retail) but volume turns it into real money. Verify volume with at least 24 months of fuel-supplier delivery records, not just the seller's claims. Verify the diesel-to-gasoline ratio too; the diesel volume is what matters.