Quote:
Originally Posted by oil pan 4
How fast are you driving?
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The first couple times I tested it, I was doing 50. First time showed a net loss of a fraction of a MPG. Second time showed a net gain of a fraction (and I mean a SMALL fraction - like 0.0-something.... in the hundredths of a MPG. Then I tried doing it at all speeds to see if it started showing an improvement at higher speeds. Nope.
- Well, maybe... at 40 and 45, the numbers were a little less, but at 50 they were the same. At 55, it was a little less, but then at 60 through 80, they virtually matched the tests without them. But it was a different day, different "calibration" on the ScanGauge (more recent fill-up), etc. I was looking for a trend, but didn't really see any.... except for maybe the fact it was worse at 40 and 45 (where the change shouldn't be as evident) shows that the whole new "calibration" moved my mileage lower, so if adjusted for that, maybe the fender skirts DO improve it at 60 and above. (in other words, without them, maybe the whole second test would have been lower MPG instead of just the 40 & 45 MPH part)???
I guess this is another example of the importance of doing MetroMPG's standard of "A-B-A" testing for this stuff .... same day, same session, then return to "A" for a "check".