That's because the price of gutter oil is lower than palm oil. In fact, the price of palm oil is not as low as the title says. Palm oil is the largest oil in the world, with an annual output of over 60 million tons, 80% of which is consumed as edible oil. The biggest consumer is Indonesian, followed by Indian, European Union and China. Palm oil, as an edible oil, is mainly used for direct consumption. Palm oil, as a kind of blended oil, is widely used in various oil additives in real life because of its low price.