Thought I would find a possible answer to my recent gas milage decrease. I got 295 miles on my last tank.... and had 410 miles on my tank in Fall of '02. Thats a big decrease... but what could be a possible reason? I have a small hole in my rear exhaust... right after where the center and rear mufflers unite. I'm going to replace both lower ball joints soon and get an alignment, but I haven't had the time. (School... and goiung on an over seas break). Oh.. I just thought about the air filter. Mine will need to be changed soon, but how big of an affect does this play on milage? So to sum up my post.. what are possible reasons to my poor milage? Where should I begin to look? Car currently has 189,005 miles.