I've just bought my 95 Mystique V-6 MTX with 146k on it and I get 275 to 325 on a full tank. I've suffered an all time low MPG at 240mi/tank. Kind of makes me miss my 450mi/tank Escort. At least till I hit the gas pedal and go, go, gooooo.
Although the all time low happened when I was screwing with it because of clogged EGR ports at the throttle and crazy TH because of the IAC. I still get a CEL but the code indicates that it's the TPS (throttle position sensor) which might have contributed to the crazy TH.

1995 Merc. V6 Finally... my 2 sets of MB Quarts PSC-213's have a good home. 10 McInstosh Sub Pioneer 8200R Head Pioneer 944 Amp