The demand on petroleum resources are increasing in recent years but the production of conventional oil is depleted. Hence, the unconventional oil seem to be an alternative. Unfortunately, the value of heavy oils are lower than conventional oils because of the content of contaminants such as heavy metals. These heavy metals cause problems during the upgrading process. It tends to accumulate during distillation, poisoning the catalyst and will cause injurious to the wall of furnace. The aim for this work is to remove Vanadyl Oxide Tetraphenyl Porphyrin (VO TPP) from heavy oil model using toluene-assisted ionic liquids (ILs). Temperatures used are 30°C, 60°C, and 90°C at mixing time of 30 minutes, 60 minutes, and 90 minutes. Result shows 1-ethyl-3-methylimidazolium octyl sulfate (EMIM OS) have higher efficiency of VO TPP removal compared to 1-butyl-3-methylimidazolium octyl sulfate (BMIM OS). Although EMIM OS removed VO TPP higher than BMIM OS but the removal was decreased at 90°C. The optimum extraction achieved when using EMIM OS is about 45 removal at 30°C and 30 minutes. Thus, EMIM OS is suggested to be used as it capable to remove VO TPP at minimal temperature and lowest mixing time which low operating cost. © Published under licence by IOP Publishing Ltd.