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Old 12-04-2012, 06:35 PM   #5 (permalink)
wmjinman
Master EcoModder
 
Join Date: Oct 2012
Location: Carson City, Nevada
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Jimmy - '00 GMC Jimmy SLT
90 day: 21.18 mpg (US)

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Interesting idea.

I think for me, a more usable figure would be to run it in gear, drive wheels off the ground, at "cruising speed", & see what THAT figure is. (we can actually get "miles covered" that way, too). I know that adds in the drivetrain drag, but how do we realistically reduce that? If you're going to say thin or synthetic oil, etc, etc, ok good. But (to me, again), maybe THAT's the way to test the synthetic oil, etc, etc. - wheels jacked up, running at cruising speed in gear. To me, that removes the aerodynamic and "real life" road variables (wind, grade, traffic, etc), but still leaves in the "real world" drivetrain & wheels turning.

What do you all think of that?

Or am I out in "left field"?
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