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Old 11-22-2011, 04:36 PM   #10 (permalink)
ConnClark
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Join Date: Jun 2008
Location: Richland,WA
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Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

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The only scientific study I can find is from 1931

http://aerade.cranfield.ac.uk/ara/19...report-359.pdf

Note: They won't be pinned down in there opinion on how it applies to a real engine.
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