According to STP:
"Improves quality of gas by adding powerful cleaning agents to help fight accumulation of harmful carbon, gum and varnish deposits in the fuel system that can reduce performance. Also engineered to remove water, which can lead to fuel line freeze. This product is made with Jet fuel, a high-quality carrier of active ingredients. This product is safe for all gasoline engines."
well if your talking about fuel injector cleaners, then yea it works for me cuz a few times my car was shaking badly and after i put in about 6 or so bottles in the gas tank everytime i gas up, my car doesnt shake anymore
There is a product that i used to use on all my vehicles that you insert the liquid into vacuum line it works it actually cleans out the carbon and what not inside you injectors
Gumout makes it... i think it comes in a box with a red bottle and grey bottle one for the tank and one for the injectors