[aerohead]

Originally Posted by Logic

I found this on the US Dept of Energy's website.
NB the URL to the link: https://www.energy.gov

I have posted the 1st couple of pages below.

Here's the link to the complete presentation;
https://www.energy.gov/sites/prod/fi..._17_fenske.pdf

Parasitic Energy Losses
















Here is another link showing a test engine used in these experiments etc;
https://www.energy.gov/sites/prod/fi...t08_fenske.pdf

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I've already explained to you why your brand of 'testing' is a 'FAIL', as far as the scientific method is concerned.
You may be looking for a 1.5% mpg increase embedded within your test, which will already show a 20% difference in mpg, in the absence of making any changes to the car at all!
Even if you followed all SAE-approved standard practices and procedures, the environmental test condition variability during your test session, from start to finish, could make it difficult to produce repeatable results, a hallmark of scientific testing.
EXAMPLE: 'Cape Doctor' SE /NE winds.
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' It's not what you don't know, it's what you think you know, that just ain't so.' Mark Twain