Have any of you tried this product. It is supposed to do wonders.

 

I'm thinking about placing a purchase on 3 bottles but wanted to get some unbiased feedback first.

I have never used it but there is a lot of information at http://www.bobistheoilguy.com. Go to the forums and do a search. According to a lot of posts it does as advertised in cleaning rings of carbon, valve guides, and generally will remove sludge from engines.

I tried in 2.5 H4 and didn't seem to damage the engine. The rinse oil was kind of dark after 1000 miles but hard to say how much it cleaned the engine. Engine still noisy like hell and drinks gasoline like crazy (55000 miles).