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Yes, the first VW 1L car got 283mpg (0.83L/100km), and it had a single cylinder 8.5HP diesel engine, so I'm sure it was pretty close to glacial...
Remember that the X-Prize is requiring 100mpg on an EPA Combined test -- not a ecodrive on the highway. This is a big difference. We'll see how many cars/vehicles can manage it.
The Edison2 Very Light Car is 650 pounds -- a little *less* than the VW 1L car, and it has a ~40HP turbocharged 250cc engine running E85 and they have devised a special throttleless intake/exhaust recirculation system that makes it as efficient as possible. And they got 83.3mpg.
We have no "official" results from anybody else.
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