Not a dumb question. It's worth trying to find a "translation" for people who don't use that metric.
Off the top of my head, all I can give you is a this single comparison point, from the earlier post about the
heavily ecomodded Renault Logan:
Quote:
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"97g/km (NEDC combined cycle) equivalent to fuel consumption of 3.8 liters/100km (62 mpg US)"
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