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bad mpg

  1. VW Jetta MKV 2005.5–2010
    I have owned jettas and passats in the past and all have given me good mpgs. I recently bought a 2006 2.5 jetta and it is giving me 18 mpg. Is this normal? I changed out the plugs, checked the intake (it is clear) and the filter looks clean. So what could be the problem. The old plugs look clean...
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