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Old 05-15-2008, 03:04 AM   #11 (permalink)
Coyote X
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Join Date: Dec 2007
Location: Southen West Virginia
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Metro XFi - '93 Geo Metro XFi Convertible
90 day: 62.17 mpg (US)

DR650SE - '07 Suzuki DR650SE
90 day: 55.26 mpg (US)
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I say a voltmeter and vacuum gauge.

The scangauge can show vacuum but nothing like a mechanical analog gauge though. A vacuum gauge can show a lot more than economy. If there are any engine problems you can usually see them in the vacuum gauge well before they are noticeable from engine vibrations or noises.

And a voltmeter is handy to have in general.

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