so i went and picked up my 03 wrx yesterday. its so much better than the celica i had before it lol. but today when i filled up i had only got about 20 mpg. is that normal? i didnt drive it all that hard so i thought it should be better. it has a 3 inch TBE and a cai. dunno if that would make a difference. is that the mpg i should expect?