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For the past few months I have been contimplating on whether or not I should perform a top engine decarbonization.  I found a discussion and some information on this topic over at 60degreev6.com but no real information on whether this is good for a high milage engine.

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Has anyone performed this procedure? ÂÂÂ if so, was it worth it? ÂÂÂ How much did this stuff cost you? ÂÂÂ Would it be good for a higher milage engine like mine (206,000 miles)?  Would it weaken my seals?

I have done it to all my cars and it really works well. The car ran better, got better gas mileage, and the spunk came back to motor--more reponsive plus my idle drastically improved. I don't see any problem with doing it on a higher mileage motor but I would recommend doing it just before an oil change just in case any of the cleaner seeps down into the oil . That is how I did it. There are alot of different manufacturers of the stuff. Check with you local auto parts store and see what they have available. I used to use a stuff called Run Rite but that was only available to shops and not to individuals. It is from a company in PA.

Thanks for your input Chris.  I wont be doing it until my next oil change, as it does say to change your oil after you do it.

I think you will be surprised and pleased with how it runs afterward. Just don't forget to clean you throttle body too. I use and old tooth brush and some spray cleaner like carb cleaner or throttle body spray.

hmm, i think i might have this done to my car while the spare motor is still in.  Do any nation wide facilities do this?

all of them do--just stay away from Jiffy Lube!!!!!!!!! Most do this service for about 69.99 or around that area.