CFR Engines Inc. (CFR®) is a leading global manufacturer of fuel rating test instruments and related equipment. Since 1928, C ... FR products have been made in North America with advanced technology, robust design, and strict manufacturing processes to deliver fuel testing excellence. Whether a CFR engine with XCP® Technology or an Ignition Quality Tester (IQT™) system, CFR products continue to provide value and confidence in global Gasoline and Diesel fuel quality. The CFR F1/F2 for Octane Number adheres to ASTM D2699/D2700. The CFR F5 for Cetane Number adheres to ASTM D613. The IQT for Derived Cetane Number adheres to ASTM D6890. read more