Originally Posted by Clem
I use 3 oz. of Lucas Injector Cleaner when ever ever I think to do so, or the MPG's start to drop off. Have used others and can't see much difference in any of them, I buy the Lucas cause you can get it by the quart and add it by the measuring cup for whatever size tank you have.
I've had better results with Lucas injector cleaner than any other injector cleaner I have tried. Used most recently on a 3.1 GM v6 with a bad #3 misfire, which cleared up quickly after using the Lucas. I use it every 2-3 months/3,000-5,000 miles.