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Old 09-01-2013, 03:36 PM   #9 (permalink)
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Join Date: Dec 2011
Location: Florida
Posts: 37

The SaTurd - '01 Saturn SL1
90 day: 34.37 mpg (US)
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I have a ScanGauge II in my '01 Saturn. And I can tell you that invoking DFCO takes some work. I don't know the exact parameters. But it takes more than 1500 RPM to trigger it. Plus there is a time delay, several seconds long. Like I said, I don't know the specifics. But I've only seen "9999" on the instant mpg display a few times, all of which were on long down-dill coasts.
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