I have a 98 with the 2.5L and that stupid slush box, and I still get 19 in town and 28 crusing at 75-85mph on the road. I dont drive to easy on it either, so it could be better.

1998 mercury Mystique 2.5L with that stupid slush box only engine mod so far a optimized tb dark blue with midnight blue leather interior finnaly got rid of the door ding guards and pinstripe