XFT is a fuel additive that improves fuel efficiency by making fuel ignite quicker and burn longer in engines. It can be used with diesel, petrol, and other fuels in vehicles, generators, equipment. To test its effects, users record fuel consumption before and after adding the recommended dose of 1 ml per 10 liters of fuel. Tests show increased kilometers traveled per liter of fuel and related cost savings from improved efficiency and reduced pollution. While results may vary, XFT is proven to consistently improve fuel burning and engine performance over time. It comes in various package sizes for different fuel tank volumes.