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Old 02-09-2004, 09:50 AM   #1
Scooby Newbie
Member#: 20870
Join Date: Jul 2002
Location: Lansing
2002 WRX
Midnight Black mica

Default gas and tuning

Is the oxygenated 'winter blend' fuel I buy here in Michigan going to have an impact on any ECU tuning I have done now, or is there a benefit to waiting until the warmer weather? What about vice versa?
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Old 02-09-2004, 10:07 AM   #2
Scooby Specialist
Member#: 21980
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Central MA
2002 PSM WRX (Sold)
2009 BMW X5


Some say it will have an effect and its not as detonation resistent as "normal" gas. Best way is to find out by tuning on crap gas and knowing that it will work on good gas rather than tuning on good gas then det-ing in the winter.
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