The effect of dilution solvent ratio, and the mixing ratio of MEK and toluene on the solvent dewaxing process has been studied. The results of this study are Summarized as follows; 1. The best mixing ratio of solvent of MEK process and Toluene when in case of light and medium Waxy oils, which has low viscosity was 48: 52, and when in case of heavy waxy oil, which has high viscosity was 45: 55. 2. The best dilution solvent ratio when in case of low viscosity oils. was 1:2.8 against waxy oils after annexing 5 times divided as well as, when incase of high viscosity oil was 1:3.5 after annexing 2 times divided. 3. The chilling temperature was -26$circ$C and the reguired dewaxing time depends on the viscosity of waxy oils.