[hottwheelin]

I just did a tune-up (first plug and boot change) on my '03 with 165,000 and my Highway milage is close to 27 with combined at 24. Not sure what could be causing the rough idle with only 32K on it. You should be getting better than 24 mpg. I use mid-grade gas because I found that regular gave me a rough idle and bad mpg's even though the owners manual calls for 87 octane. Stay away from the super as my mechanic (lead mechanic of a Lincoln dealership) told me that it will trigger premature "check engine" light. Hope this is of any help and good luck!!