User: Is fuel injector cleaner a useful fuel addictive or is it just pouring money down the drain?
Assistant: It’s definitely quite useful to use some cleaning agents for fuel injector, as these systems become dirty over time due to the fuel passing through which can cause engine performance issues.  However, when cleaning products are applied directly to fuel injectors, this is not intended, as these products are designed to be added to fuel.  The product you’re referring to is meant to be added to the fuel tank of the engine as a fuel additive, which promotes engine performance and fuel efficiency.  Therefore, this product should be applied to the fuel tank, rather than to the fuel injectors.  I hope this helpful!