Hi Ken, excellent work.
Specs as can be found on
your site.
I believe it could do 244mpg on a closed circuit, at low speed, no suspension, no generator, oversized tires on high pressure, engine insulation, gearbox insulation, heavy P&G, etc.
That plus the car was already very light to begin with.
My car has none of that and can do 70 mpg or better in warm weather, driven at a constant pace of 35 mph. It must be over 3 times as heavy as the little Fiat. I have no doubt whatsoever that the Fiat could do 244 mpg.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.