From your last post, you want to know the easiest way to get reliable results.
Well, make sure you have data recording/tracking- SG/UGii, so you can calculate the distance. A-B-A testing works best. So, I would advise finding a nice route you can use cruise control and just let it go. Try to make sure it is not a busy time, and won't be interrupted by cars on your rear end or slowing you down.
Two things you can think about. Like Metro said, as things warm up, they get better. Engine, tires, tranny, the whole shibang. So you can do A, then B, then A2, and focus more on the change between B and A2, as your changes should be minimal from nature (wind, temp, so on), and you A2 should be
more so efficient in general from warming up more.
Example:
Run A netted 20 mpg
Run B netted 25 mpg
Run A2 netted 23 mpg
Focus B vs A2, B may not be optimal, but it is a better reflection than A vs B.
Another idea is to warm the vehicle up very well before hand. Drive 15 or so minutes away, then back, and do your test. The Insight is at lean burn temperature within a mile at 35* F, but the transmission and tires are definitely not. LEt your vehicle sit for as long as it takes to equip/remove the gear, don't hop right into the test.
Then your ABA should be more spot on.
And, theres always ABABA, on the same route or technique. The biggest point to show credibility is actual proof, such as video, and data. For reliable data, your best benefit is to reduce variables. It's near impossible to eliminate them, but if you do your best to record and eliminate, the better your results.
Edit:
Note this is the internet, and many of us have no proven credibility. Other than the three people I met for my fuel economy challenge, I have no proof. Heck, my tank wasn't sealed when I left, I could have put some fuel in along the route, even. I didn't, and I don't think the other two did, but we have little proof without being there. The bigger/more arrogant the claim, the less likely we are to believe, but with data, most things are reasonably taken. We all know underbodies work...you just want to quantify for your vehicle. Post up your results, and we'll all be happy to work with you
