Heya Ryan!
I've got a '98 3.2L ES also. The indicated (trip computer) gas mileage has always been really sweet on such a large car -- the baby can cruise on flat ground well over 70mhp and average 30mpg or above. Throw in a few hills, or horse around with the throttle, and the mileage drops fast but it's still very good.
I've just removed both of those stock mufflers behind the rear wheels and put in a single Flowmaster -- it really sounds sweet. Gas mileage will likely stay the same or improve slightly.
If you think your engine is running slightly rich you might try a performance muffler since that should lean it fractionally, assuming the ECM computer doesn't simply put in more juice to compensate. But then more juice to compensate means more horsepower so why argue with that?
Marcus
'98 Intrepid ES 3.2L -- slate
I've got a '98 3.2L ES also. The indicated (trip computer) gas mileage has always been really sweet on such a large car -- the baby can cruise on flat ground well over 70mhp and average 30mpg or above. Throw in a few hills, or horse around with the throttle, and the mileage drops fast but it's still very good.
I've just removed both of those stock mufflers behind the rear wheels and put in a single Flowmaster -- it really sounds sweet. Gas mileage will likely stay the same or improve slightly.
If you think your engine is running slightly rich you might try a performance muffler since that should lean it fractionally, assuming the ECM computer doesn't simply put in more juice to compensate. But then more juice to compensate means more horsepower so why argue with that?
Marcus
'98 Intrepid ES 3.2L -- slate