XFT is an additive that improves fuel efficiency by making fuel ignite quicker and burn more completely in engines. It can be used with diesel, petrol, and other fuels in vehicles, generators, equipment. To test its effects, users measure their baseline fuel consumption and mileage over 3 tanks of fuel, then add XFT and measure consumption over 5 more tanks. Testing typically shows increased mileage, reduced fuel costs and pollution. XFT dosage is 1 ml per 10 liters of fuel and should see results within a few tanks, though timing varies depending on engine condition. It is available in various package sizes.