Serpentine belt broke
O2 sensor malfunctioned.
This little green wagon has got to be this man's best friend. Twice across country and back and twice to Florida if I do 55 mph on the highways in cruise I get 50 mpg. The only thing that doesn't work is the motor that drives the passenger mirror. That is because a tree fell on the car and sheared off the mirror. I glued it back together and now I am in business. The car is comfortable and reliable.
I highly doubt you ever got 50 miles to the gallon out of a ford. I don't care if it's a 4 cylinder and you were going slow.
I routinely got 44mpg @70mph with my 5 speed Escort from 1996.