the chevette was a surprisingly good economic car though, most especially for its time. I had a friend who didnt drive it very conservatively and still managed to pull high 30's hwy
and the prizm/toyo is rated for 37 hwy so 40 is way easy to achieve. I dont know enough about spectra's so I cant really say anything about those.
I think your right though, in most respects, any car that is rated for the mid 30's is pretty easy to achieve 40mpg with a few simple changes with the wheel nut mod alone
