*2.3. Fuel Preparation*

The fuel compositions of WPO–gasoline blends (RON 88 and RON 90) for the three mixture ratios used in the experiment are shown in Table 1. Three mixtures of WPO and gasoline (RON 88), and three mixtures of WPO and gasoline (RON 90), with different percentages of WPO, specifically 10%, 20%, and 30%, were used in the experiment. WPO–gasoline mixtures (RON 88 and RON 90) were placed in a 1 L beaker, then blending was carried out using a magnetic stirrer for 10 min at a speed of 300 rpm at room temperature. The resultant blends were stored in different bottles, separately. To obtain the physicochemical properties of the oil mixture of WPO–gasoline blends, such as viscosity, density, and calorific value, the equation of mixture-oil properties was used as follows:

$$CV\_{blend} = X1 \times CV\_{WPO} + X2 \times CV\_{RON} \tag{2}$$

where:

*CVblend* = Calorific value of fuel blends; *X*1 = Percentages volume of WPO; *X*2 = Percentages volume of pure gasoline; *CVWPO* = Calorific value of WPO; *CVRON* = Calorific value of pure gasoline.


**Table 1.** Preparations of fuel samples of waste oil plastic blend with gasoline (RON88 and RON90).
