I'm curious to find out what is the most efficient speed for other Smarties. I've always been told 50-55mph is the most efficient speed. However while testing out my new guage (and I have no clue if it actually is acurate) it seems to give me the highest MPG reading at 74-75mpg. Is this right? I haven't finished calibrating my device yet... so far its at +65%, and seems to read pretty close to my calculated MPG (it reads around 12MPG @45mph before calibrating, which obviously isn't correct), either way the highest reading regardless of calibration should be the most efficient speed, right? What the actual MPG is, well that's another story.
Has anyone tested different speeds, preferably with an accurate gauge (ie... scan guage II) to find out which is the most efficient. I know miles out/gallons in is the most accurate overall... but that doesn't help with the exact speed for peak efficiency.
I'm a science teacher, so I like my data, and repeatability/validity of results. (and am wishing I had the data logger right now... so many variables especially with no cruise control!)
~On A Side Note~
The Smart delivered a rather frugal 33 mpg city and 41 mpg highway in the 2008 EPA tests. And that's not good enough, says Smart's parents at Mercedes-Benz
Driving today, my gerbil didn't seem to like the 50-60mph range. 45mph was giving me some pretty high reading today, 68MPG. Then it seemed to drop to 41ish between 50-60mph. Then rise again around 70-74 to 62MPG (again, I have no clue if my guage is accurate...) My overall for today's trip was 39MPG (which is around what I exect for the type of driving) Good fillups have been in the 38-39MPG range... bad driving tends to get 32-34MPG at the pump.
Need to now pay attention to how close I am to the car in front of me... or no car to slip stream behind. Optimal distance w/out tailgating, to reduce drag?
I have an "ecometer" and when I first plugged it in it would tell me I was getting high 40's to mid 50's but when I would fill my tank and do the math the reality was I was getting my normal mpg in the high 30's range(38-39). Then I fine tuned it by setting the efficiency (engine efficiency setting) down to around 82-83% and then my readings on the Ecometer and my real world readings started to match more closely. I have been contemplating getting a Scanguage II because I would like to have other engine readings available and I am curious whether or not it has a setting for engine efficiency? Are those who's Scanguage II tell them they are getting 50+ mpg getting that same reading when calculating mpg at the pump after a fill up?
It makes sense that it rise again at 70+ as the MIVEC variable valve thingly kicks in to bring up the efficiency at higher rpm