All the confounds CapriRacer mentions being good to notice, I agree with him that this is great nonetheless. Others have found it really hard to get ideal conditions for testing too. Lots of work in this. Your conclusions suggest confirmation of other tests. Useful. Many thanks.
See my my car's mod thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape. My fuel economy goal is 55+ mpg while averaging posted speed limits. See my Honda manual transmission specs post too.