I have a 1994 LX. For some unknown reason my mpg has dropped from 30 mpg on the highway to 23-24. This wasn't a gradual change, it was from one tank to the other. It has been this way for several years now and every blue moon or so I will get another random 30 mpg on a tank and then the next one will drop off back down to 23-24. Ideas? Suggestions?
