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Old 05-18-2010, 01:01 AM   #1 (permalink)
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Join Date: Apr 2010
Location: Far Northern California
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Outback Sport - '08 Subaru Impreza Outback Sport
90 day: 25.84 mpg (US)
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Tachometer or Vacuum Gauge?

I am trying to decide between getting a Vacuum Gauge or a Tachometer as my car has neither. I have a 1981 Honda Civic Wagon so a Scan Gauge II is out of the question.

Which would give me better feedback for the purpose of improving FE?
Which would have the most impact?

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