I ave recently seen a big drop in my fuel efficiency from an average of about 29.5 MPG around town to 25 MPG around town. This happened after a computer code for an O2 sensor and a mas air flow meeter. Both were changed along with new plugs and an air filter. First I put new plugs in and the MPG went back up. After the sensors and air filter were chnaged it went back down. Does any one have any ideas why?

richer then it was before causing you to use more gas.

you must be him, i get 17-20mpg around town, but i like making the boost gauge workout. on the highway i manage 28 or so (cruise at 80-85, occasionaly run to 3 digits)