hi guys i have a 94 civic and it has about 130k on it and it has black smoke that forms on my bumper and when i clean it of aweek or 2 latter its right back again. Also there looks to be sum slug type build up around the back of the head below the left corner of the intake manifold. OOand the oil gets black fairly quickly and i gta add sum oil every once in awhile. i was just woundering if anyone could help me with this prob or had one like it b4 and wat you did to fix it. Thnks