Store Locator Osage FAST STOP Express3526 Lancer AvenueOsage, IA 50461 Contact Phone: 641-732-4643 Website: https://www.agvantagefs.com Get Directions Amenities 24 Hour Pumps Credit Card Only Fuel Types Gasoline Diesel E-85 E-15 Fuel Prices Regular $2.87 as of 5/11/2025 6:24:00 AM Accepted Payments American Express Discover FAST STOP Cards Gift Card Mastercard Visa Voyager Wright Express