prolong vs zMax

ok i dont know if they work on the engine but i was thinking about buying one of these engine treatments. i dont want to waste my money on these. Has anybody tried them before????? which one should i use

Its not worth it. I have friends that go to tech skool and they tested it out. All they told me is not to get it cause it doesn't do much or anything.

What kind of engine treatment? Fuel Injector cleaner or oil treatment? Sorry, never used either one of those. I know Lucas is a really good oil treatment, I forgot what I used last time for fuel injectors, I do know the Octane boosters help out though. Used those before and makes a little bit of difference, not for treatment, just for more response from your engine.

me either, i havent used these before. but i was wondering i could get the engine treatment!

Mechanic-in-a-can :p :D :p