55 Gallon Drum - Price - DEF - Shop | API-Certified-DEF-Fluid For Sale | 55 gallon drums of DEF Diesel Exhaust Fluid / Free Shipping | DEF - diesel exhaust fluid that meets ISO 22241 standards and is API certified. If you would like to order more than 4 drums of diesel exhaust, please call. Call: 1-855-405-6789 Order online / Free Delivery Previous articleNext article