The product is called RVS and it creates a ceramic layer in high friction areas to improve efficiency. With the 2.7t in particular, this is a good product. This patented product is TUV approved, has alot of testing data and is already in use in Europe. I treated my S4 and after the first application I noticed the engine was quieter. I also noticed slightly better mpg's. Nothing ground breaking but added 2-3 mpg after the treatment. Since selling the S4 I have purchased a 5.0 Coyote powered Mustang which I treated as well. I noticed the same benefits in the V8. If interested in more info, please follow the link below and watch the videos on the site which go in depth with the technicals.
http://www.rvs-usa.com/

For the record, I did contact the forum about this product with respect to sponsorship/advertising issues and didn't hear back from them.
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