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 Fuel Prices Regular $2.66 as of 12/19/2024 4:11:04 PM Diesel $3.27 as of 12/19/2024 4:11:04 PM Accepted Payments American Express Discover FAST STOP Cards Gift Card Mastercard Visa Voyager Wright Express