Reduced chemical kinetic models have been developed to describe the combustion fundamentals for practical high hydrocarbons fuels over a wide range of experimental conditions. The fuels include n-Butane, Benzene. n-Heptane. Gasoline, Kerosene (JP-8), and n-Hexadecane. The mechanism for each fuel includes a single reaction expression for fuel and oxygen to form formaldehyde (CH2O) and hydrogen (H2) or carbon monoxide (CO)together with a detailed reaction mechanism for CH2O-CHO-CO-H2-O2oxidation. These kinetic mechanisms will be as generally applicable as possible and can be used in 2-D or 3-D combustion models to understand the practical combustion and emission problems in engines and furnaces. Each mechanism consists of 13 chemical species with 22 elementary reactions