I had thought at one time i was burning oil but i really dont think i am because im not losing any and its not white smoke its black..... when i rev, at high RPMs i get a puff of black smoke and during normal driving i get crap on my muffler and my bumper which is black, I also wonder if its my cat and maybe i need to put a new one on, or am i running rich, and if it is what should i do?just would like some input. I would love just to swap but im a college student just trying to get by with the money i have lol!!!

92 civic DX hatch
D15
I/E
Steeles