I'm confused... (1 Viewer)

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chford

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Jul 29, 2007
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Location
Cincinnati, OH
Why did replacing my battery suddenly increase my gas mileage?

Further, my mileage has decreased over the past 3 months; I've been monitoring it via my ScanGauge. All of the sudden the battery craps out, I replaced it and danged if my mileage didn't start reporting 2-3 mpg more!

Any ideas out there or is this an impossibility?
 
Probably the extra drag the alternator has as it is pumping out all the current it can to bring the battery up to where it should be. That would be my guess.:hmm:
 
Does the scan gauge after loosing power (replacing the battery) have to re-learn or anything?
 
>Probably the extra drag the alternator has as it is pumping out all the current it can to bring the battery up to where it should be.

Seems reasonable...for a half banana mechanic type like me!

>Does the scan gauge after loosing power (replacing the battery) have to re-learn or anything?

It doesn't seem that's the case. Seemed to hold the settings from pre-battery change.
 
The Scangauge uses flash memory, which (from what I have read) doesn't require electricity to remember stuff.
 

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