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  1. Chrysler 300 Performance Mods - Engine - 6.1L
    There's been an ad in Hot Rod for a few months for an oil "booster" called PX3. Their claims were impressive - "up to" 5% horsepower, and an improvement in gas mileage. Yeah, I know, most of them are BS. However, when I went to their website, they showed dyno test results. One was for an '06...
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