1slosol, do you have straight exhaust piping on your car, or as far as that goes, or any exhaust work done?? if you just have some on the bumper it's from the exhaust being moded, even if you just have a muffler. mine has black shit all over the bumper too. also, it's usely from the higher rpm's that cause it to burn oil, espcialy when the V-ATTACK kicks in. shit happens. just check your oil and and make sure you keep it full, then you should be alright. i mean as long as it's not blowing a big as cloud of white smoke out the back or something of that manner. and the black spots are mostly just carbon deposits and suit.