1995 Toyota Camry Q&A

1995 Toyota Camry Question: I was getting about 40 miles to the gallon but all of a sudden I may get 20 mpg.

I took my car to a mechanic just to glance at and they said transmission and motor both sounds good. Not leaking anywhere either so I am so confused??? -
Answer 1
Has got to be a noticeable difference in performance for mpg to be cut in half!! Sure about 40 mpg? What engine? What transmission, automatic or stick, some were manual shift. -
Answer 2
Is the check engine light on? -