In this research two Turkish crude oils (medium and heavy) were separated into their saturate, aromatic, resin, and asphaltene (SARA) fractions by column chromatographic techniques, and combustion experiments were carried out on whole crude oils and their fractions by thermogravimentric analysis (TD/DTG) under air atmosphere at a 10 degrees C/min heating rate. Investigation of SARA fractions allows quantitative determination of the temperature intervals at which evaporation, oxidation, and combustion effects operate for each fraction. In the course of this research, the kinetic parameters of SARA fractions were determined according to the Coats and Redfern technique. By using the data and findings of this research, one can take advantage of studying the kinetics of SARA fractions instead of those of the complex whole oil for modeling of the overall process to accurately predict combustion.