An approach to contribute to the development of new environmentally friendly fuels is the formulation of models to predict the FP of combustible and flammable liquids. This would aid in flammability characterization, which demands time, labor, and financial resources. Currently, the most popular method used for FP prediction is the model proposed by Liaw et al. , which is based on lower flammable limits (LFL) as described by Le Chatelier's rule for flammable mixtures . However, despite its popularity, this model has some limitations, such as its reliance on pure component FP data and the requirement for exact composition of each component in the mixtures.