I've never been a fan of this carb stuff as there is a bit of dirt floating around in it, but it works great for applications that don't have passages that can easily clog! Usually use it on cobs as a good 24 hour soak will clean them off a ton of carbon without cleaning! Soaking them longer will make them even cleaner, but usually a day is enough. It's also great for soaking dirty screws and fasteners before a thorough cleaning and rinsing. It has a fair price and can be reused several times. Indispensable for every workshop!