Like I said, Paul good job - a huge plus to you for making those vids for everyone looking for help.
I was having a little fun with the note on hills. The point I wanted to make was how radically different our driving terrain is to yours, in general. Looking at the first vid, you were essentially driving in 45 mph speed zones the entire time with seemingly minimal change in elevation, what I would describe as absolutely optimal conditions. We rarely see anything like it, almost no 45 mph zones. Perhaps 90% of our driving is significantly different. With respect to speed, most of our trips are either short runs around town in 25-35 mph zones with cold starts, or on freeways at 58-65 +- mph. With respect to hills, we have some 'weeee' factor hills thrown in for coasting on every trip from the house - and subsequent hill climbs which quickly push the ICE acceleration past "2 bars" in order to keep pace with traffic.
The net result with respect to speed & terrain in MPGs (your location to ours) is perhaps not great, but I do think more gentle terrain (which is a function of grade and not elevation difference - yours?) is more favorable (& certainly different) to the combination of "weeeee' down hill coasting and higher rev up hill climbs. Your 'hills' seemed perfectly suited to the C-Max, never having to push the ICE above the "2 bars".
Summing up, I think this highlights (at least for me) the notion that there are three fundamental elements playing here, with regard to gas mileage: weather condition differences, driving pattern differences, and terrain differences. I would be so bold as to rate them with an arbitrary 55/30/15 significance; with weather differences being the preeminent 55% significance over our range of latitudes from Hudson Bay in Canada to Texas, driving patterns being secondary at say 30%, and terrain differences being as much as 15% of the difference 'equation'.
Just thoughts, 'weeeeeeeeeeeeeing' down our drumlins in Seattle - and 'grinding up' at "2-3 bars" if in the opposite direction,
(((Difference+-+- say: 50-32 = 18; 55% = 10+-, added to 32 equals 42+-; 30% = 5+-, added to 42 equals 47+-; 15% = 3+-, added to 47 equals 50+-; then with aero/heat retention mods add 3-5 and you can get 53-55 MPG, .............voila )))
Edited by C-MaxSea, 19 April 2017 - 10:19 PM.