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Old 07-07-2013, 10:23 PM   #443 (permalink)
JRMichler
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Join Date: Feb 2011
Location: Phillips, WI
Posts: 985

Nameless - '06 GMC Canyon
90 day: 37.45 mpg (US)
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Quote:
Originally Posted by mikeyjd View Post
i guess they work since the readout can't lie.
I know, I know that was sarcasm. But I'll give a serious answer.

When in grad school, I took a course in Dynamic Measurements. A whole semester studying all the ways that readouts lie.

Summary: There is no such thing as a readout, any readout, that is 100% accurate. There is only "good enough".

That's just for the readout. Don't forget the confounding factors: temperature, wind, speed, driving habits, terrain, elevation, tire pressure, tire wear, engine efficiency, ...
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The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
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