My '85 wagon gets anywhere from 21.5 to 28 mpg. Usually it is all city driving, and that is when it gets from 21 to 24. When I mix in just a little highway, maybe 40-50% of the tank, then it was more in the 25 to 28 mark.
I have never taken it on a highway-only trip yet.
Still, 21 to 25 isn't bad at all, considering my F150 gets 13 to 15, and my wife's Toyota van gets 18-19mpg...

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

.............keep them in mopeds............