My last Nissan Sentra (1989 hatchback) went over 1,100,000 km and would push 50mpg on the highway... mind you it had 30 less hp than my sedan and only sat 4.

Brings to mind the early Honda CRX... the 1.3 litres models could approach 70mpg and the bigger 1.6 still saw mileage in the 40's and at 1700 pounds they still had a good power to weight ratio.

Most of these I see are completely murdered out and would love to find a stock model.