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Old 07-10-2012, 05:14 PM   #5 (permalink)
Gasoline Fumes
Too many cars
 
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Join Date: Oct 2009
Location: New York State
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CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
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Insight 5342 (no IMA) - '00 Honda Insight
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I wasn't very scientific about it, but I tested this recently. There's a hill I can coast down, starting at 50 MPH and ending at a stop sign. I usually end up going around 22-23 MPH where the road levels off before I need to brake. Windows are usually closed or slightly open. I tried it with all 4 windows open in the Wagon. My speed dropped down to 20 MPH. All done on different days, but the windows closed speed of 22-23 MPH has been pretty consistent.

My friend's heavier and more aero 2002 Jetta only drops to 35 MPG on the same road.
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