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Old 11-18-2013, 07:47 AM   #8 (permalink)
EcoModding Lurker
Join Date: Oct 2012
Location: Florida
Posts: 11

Focus (Stock) - '10 Ford Focus SE
90 day: 31.09 mpg (US)

Sonata - '04 Hyundai Sonata Base
Team Hyundai
90 day: 25.2 mpg (US)

The Van - '04 Ford Freestar SES

BRZ - '15 Subaru BRZ Limited
90 day: 30.71 mpg (US)

BRZ (E85) - '15 Subaru BRZ
90 day: 21.54 mpg (US)
Thanks: 5
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Almost the same problem here. I didn't get as much deviation, only a few tenths of a gallon, but one time I suddenly got about 2 gallons off. I've been recalibrating every fill up since and now its usually under by .2-.4 at most. I'd say that might be your cure... At least try it for a number of tanks and if it does get better then try leaving it.
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