was wondering how much it costs to change it at the service station? I've read that the process is quite involved and time consuming. I'm not too handy like I used to be. I have 42k miles on the car. Bought it with 20k. Gas mileage has gone down 2-3 miles per gallon in the last 2 yrs. Want to reverse this. A tune up is probably not yet due. Any suggestions?
dodger 1948