I haven't used any in my mustang, but I hear guys at work talk about Lucas injector cleaner, sea foam and other cleaners. Is this stuff worth it? I was always told that the gas we buy today already has additives that does the job.
On my 1st car, the 3.8 mustang, I ran several different kinds over a long period of time and the car ran much better and got better gas mileage in the end. So i'm not sure what works best but I prefer seafoam.