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X1r has anyone used this.

shariain Mar 14, 2012

  1. shariain

    shariain Well-Known Member

    I was thinking about buying some of this after one of my workmates used it in his BMW 525 and he was saying he found a slight increase in fuel economy and a reduction on engine noise. Just looking to see if anyone else has tried it or known anyone that's tried it.

    X1R Performance Engine Treatment NASA Used & Approved


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