To those with the same engine as mine, that is a 2004 4 cylinder (or any year with the exact same engine) with manual transmission, what is your average MPG? I ask because i feel i'm getting a few MPG less than i should. I get 29, but my 2001 civic got 39. It just seems like to big a difference. Is 29 normal for a four with manual trans, or if not what should i look at as a possible reason? I have 24k miles on it and i replaced the air filter a couple thou ago, and i use mobil 1.