The dynamic pendant drop method was employed to better understand the adsorption kinetics at the oil/water interface. Various volume ratios of n-heptane/toluene (heptol) have been chosen as solvents to represent the model of crude oil systems. The results show that an increase in the asphaltene concentration reduces the interfacial tension and this reduction is much more pronounced at higher fractions of n-heptane. The Ward-Tordai short-time model was used to estimate the diffusion coefficient of asphaltenes for dilute solutions of asphaltenes in heptol (up to 0.01 wt %). The results show that the asphaltene adsorbed as monomers onto the interface and the bulk nanoaggregates do not contribute to the adsorption process. Furthermore, the results reveal that the asphaltene diffusion coefficient decreases with increasing its concentration and decreasing solvent aliphaticity. The Langmuir adsorption isotherm was used to study the asphaltene behavior at the oil/water interface and to predict the parameters of adsorption kinetics. It was shown that asphaltenes were adsorbed as monomers onto the interface. The results show that at higher n-heptane fractions, more asphaltene molecules are adsorbed onto the interface. A higher concentration of n-heptane in solvent results in faster and more asphaltene adsorption on the oil/water interface leading to lower interfacial tension and thus promotes emulsification. These findings improve our understanding of adsorption kinetics of asphaltenes at the oil/water interface and find applications in oil/water separation and solvent-aided recovery of heavy oil and bitumen.