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Old 11-20-2022, 05:24 PM   #159 (permalink)
Blacktree
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Join Date: Dec 2011
Location: Florida
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The Prius Experiment - '07 Toyota Prius Base
90 day: 58.52 mpg (US)
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Quote:
Originally Posted by hayden55 View Post
I would say your testing conditions have a real world error of a handful of percent. So it would really be impossible to test if that stuff really worked with such a low percent change. Maybe if your car got 50.0mpg evey month of the year it would be more verifiable.
I tend to agree. The driving conditions are not as consistent as I would like. Plus we have things like changing seasons and occasional maintenance issues skewing the results. Also, this method of testing fuel economy takes a long time.

Most of the mods I'm doing are aerodynamic. So I think it would be a good idea to try some coast-down testing.
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