Black exhaust tip on an ek civic

[micvel]

Guys ask ko lang if this is normal? Stock lang lahat. Nililinisan ko pero nagiging black pa din yung exhaust tip after some time. Every 3mos. or so dumudumi/ nagba-black yung sa may tip niya. Malinis air filter, RP oil, no leaks. Civic lxi 99 matic

[7138]

Guys ask ko lang if this is normal? Stock lang lahat. Nililinisan ko pero nagiging black pa din yung exhaust tip after some time. Every 3mos. or so dumudumi/ nagba-black yung sa may tip niya. Malinis air filter, RP oil, no leaks. Civic lxi 99 matic

Very normal,
As long as exhaust emmision ang hindi nagblablack, normal lang yan.