good point. if you do not have and oil leak any where, unless your like me burning it out from reving so damn high all the time, it's just suit. yeah i know it's a bitch to keep wiped off, i finally just gave up on keeping mine wiped off. to help get the carbon and shit outta the motor pour in a coupleof gas treament shits, try runing high octane gas or racing fuel, or get high octane gas as in 93 grade and put some denatured alcohol in it to help burn out carbon deposits and shit. i did it, and it helps. i still get suit and shit on my car though because i have full racing exhaust and the muffler ends right at the bottom of my bumper and it still blows a little on there.....

BTW, i forgot to add this but, my motor has 193,000 and some odd miles on it. so i know about the motor being old...