This work simulates the heat and mass transfer of the fuel droplets evaporated in a hot medium. The proposed model includes the vaporization of multi-component fuel droplet, in laminar forced convection. The results show that the various components, of different molecular weights, vaporize at different temperatures. Furthermore, the non-miscibility of the mixture of the hydrocarbons liquid droplet is observed. The profile of the regression of the droplet square diameter does not follow the \(d^{2}\) law and presents three evaporation rates rather than a single one. New correlations for the evaporation rate versus Reynolds and Schmidt numbers are proposed for different air velocities, different initial droplet radii, and different initial mass fractions.