So I replaced my transmission (3rd time!) 196,000 KM which is 120,000 Miles. when I got the car back I had a check engine light which pointed to Oxygen sensor (I think). Replaced that. Now I am only getting about 10.5 mpg. I don't know exactly but based on frequency I was filling up, I think I was getting about 15 MPG prior to transmission replacement.
What should I do?
What should I do?