Re: [T3] Automatic gas mileage?

[John Jaranson <jaransonT3@comcast.net>]

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On Mar 5, 2005, at 4:37 AM, Parker-Durost wrote:

> >One of these days it would be interesting to plot out the data and 
> see >what it shows.
>
> 	I too have this data since I bought the car in '97.  I put it into 
> Excel, charted it and it is very interesting.  First I noticed how 
> little I drove the car for the first 3 or 4 years.  Also, I could 
> clearly tell where I rebuilt and rebushed the carbs.  Now with a 
> steady year round commute I can see the seasonal rise and fall: 21 to 
> 23 winter and 24-26 summer, mixed highway and city.  Worst mileage was 
> 17 before carb rebuild, best was 32 on I-84 in Eastern Oregon on the 
> way to Parma (70 mph not 55!).
> 	If I can figure out how to output an Excel graph into html I'll post 
> it online.

Got the mileage data for Sophy off my PDA this morning at work and 
plotted it up in Excel.  Here is the plot:

http://mywebpages.comcast.net/jaransonT3/SophyMPG.jpg

I considered the cold months to be October through March and warm 
months are April through September for the sake of computing averages.  
As you can see there is a pretty big swing in the warm (24.3) vs cold 
(18.8) miles per gallon.  You can also see that there is a quite a 
large tank to tank variation depending on driving conditions and types 
of trips taken for a given tank.

The year plus gap is when I had her off the road for her major redo.  I 
am also missing the first 8 months or so of data due to my PDA crash.

BTW, I just copied the chart in Excel and then pasted it into Photoshop 
in order to generate the JPG image for the web.

Later,
John Jaranson
'66 Square (Sophy)
'71 Fasty (Jane - darkside project in waiting)
various parts.....don't we all.
http://mywebpages.comcast.net/jaransonT3/jaransonT3/
http://mywebpages.comcast.net/jaransonT3/2006Invasion/
http://mywebpages.comcast.net/jaransonT3/notavwclub/

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