The best thing you can learn to do is to change your spark plugs and gap them properly. It is about the only maintance thing you can do on your car these day.
Oh boy! How long is the spark plugs changing course? Is it offered at most local community colleges? Spark plugs still need gapping today?
The cleaner itself is designed to remove the tarnish/gum deposits left by your fuel. By putting this in your gas tank, it begins to work immediately on the tarnish/gum in the tank. This in turn loosens the gunk and it has nowhere to go but towards the fuel filter and then injectors, gumming more stuff up as it goes. It may temporarily work, but will cause more issues in the long run, IMHO.
Changing and gapping is easy IF you can get to them.
I've done two of the family cars recently. Both 4 cyl, FWD. Spark plugs right on top in easy view. Easy, I was just very, very nervous about stripping the threads and turning a $100 savings into a $1000 expense. No problems though.
The mini van is a V6, I can't even see or feel where those back three wires go to. I had no problem paying for that.
-ERD50
ERD50,
Sorry. I was being sarcastic .
Not sure I agree with you. If what you're saying is true, then most of the gasoline sold are bad, because most of them have the cleaner in them.