[aerohead]

I have the original coast-to-coast Metro road tests at home. I'll look for them for Monday.
When this car hit the market, the USA was still under the 55-MPH National Speed limit, and the car was engineered for this 'condition.'
The EPA HWY rating, on the dynamometer, was achieved at no greater than 60-mph, momentarily, with an 'average' speed of only 49.6-mph for the cycle, and includes full stops.
( the 1992 GM ULTRALITE achieved its 100-mpg @ 50-mph )