[aerohead]

decades ago, University teams were reporting 7,000-mpg with their SAE and Shell mileage / eco marathons racers.
We were looking at :
* Single seating.
* around 320-pounds total mass.
* Less than 4-square-feet frontal area.
* Average track velocity of 22-mph.
* Wind-protected course.
* Sub-critical Reynolds number.
* Bald tires @ 200 psi.
* 'Burn-and Coast' ( Momentum Driving ) [ Pulse and Glide ].
* Single-cylinder Briggs & Stratton ICE engine.
* Exposed valvetrain, five-valve pent-roof cylinder head.
* Bicycle derailleur transmission.
* No movement within the 'cabin.' Not even head movement.
* No heater.
* No air conditioner.
* No entertainment system.
* No noise insulation.
* No vibration isolation.
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If we're to discuss a '200-mpg automobile' we'd want some context.
- VW 1-liter car
- VW L1
- VW XL1
- Tesla Model 3 @ 45-mph with five aboard.