Retail prices: U.S. Energy Information Administration (EIA) weekly state averages. Wholesale base: OilPriceAPI live market price (pre-tax). Wholesale delivered = base price + federal excise tax + state tax + bulk delivery. Federal diesel tax: $0.244/gal. State taxes: PFleet/EIA Jan 2026. Delivery based on 7,500+ gal truckload proximity to terminals. Savings are estimates — actual prices may vary by terminal and delivery date.