Ordered out of curiosity, much to the dismay of my car friends. They said it would never work and it was a scam but it just isn't. Installed in a 2012 Chrysler 200, the mileage went up from 22.4mpg to 26.2mpg city. 24.8mpg to 28.5mpg highway. Notice no real change in horsepower, but a significant increase in gas mileage. I am absolutely delighted with this product. If I had known, I would have bought MUCH sooner.
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