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Old 09-01-2008, 11:52 AM   #3 (permalink)
dcb
needs more cowbell
 
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Join Date: Feb 2008
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Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
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I just use as necessary, like if mpg starts dropping or rough running or getting some codes, maybe a bottle every couple years even on cheap gas. No fixed schedule though, YMMV.
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