Whatever the initial condition of your petrol fuel injectors – cleaning the fuel injectors will result in an increase in performance and fuel economy and pay for itself in no time! High mileage engines and engines that are used mainly for short trips or ‘stop and go’ driving will benefit the most. We test and clean most, popular petrol fuel injectors, including; rail and hose mounted fuel injectors, top feed fuel injectors, side feed fuel injectors, GDI and SFI injectors.