Intake Valve Cleaner CRC 05319

My 2005 325i sulev engine with 160 thousand  miles was at a point where 3 different garages, ( including a dealership) told me to give up. They said I had so much carbon in the engine that the best they reccomend is don't spend any more on it. Well, I grew up in Detroit, and I know it's never over till I say so. So I bought 3 cans of this product. Before spraying, the engine, (read the directions) it was noisy and knocking. Well, after halfway through the first can,  the knocking went away! So I figure if one can did this much improvement then 3 cans should do it for my first attempt.  Beware!! Do it outside with open air!! The white smoke started billowing out the tailpipe. It was so much, I was sure I screwed something up. But much to my surprise,  after a while the smoke went away. Wow, has performance returned! All I can say is I am 100% completely satisfied. My engine surges where it used to stall. At 160 thousand miles, this engine sounds like new. I'm not kidding.  After I was done cleaning and letting it idle to keep clearing the smoke, I came back, and walking up, I thought it must have stalled because I couldn't hear it running. I have had to check my rpm gauge twice at stop lights to make sure its running! This product is going to be a regular maintenance item.