ABSTRACT Kerosene is the fuel used in stoves, but the price of kerosene is very expensive. Based on the above, a mixture of used cooking oil with pertalite can be used as an alternative to kerosene fuel. This study aims to determine the effect of variations in the mixture between used cooking oil and pertalite (9:1, 8:2 and 5:5) on the color of the flame and the time needed to boil 1 liter of …