Found one recently. One owner with 131K. Very clean.
So far getting between 37 mpg on the very low side to 55.3 for my best tank.
Have done a couple of aero mods.... slight tail and nearly parabolic nose cone/grill block.... last tank was 49 but this is a good sign as it was with a passenger in the car and half mountain driving (including a 1/2 hour stop and go uphill wait for an accident).