exhaust smoke marks

[zahra]

From quite sometime (3 months) im noticing that the back of my car having some black exhaust gases mark on top of my rear bumper.

Arabian Automobiles saying its normal and they cant do anything. My concern is why its happening now and not three years back when i purchase my new Infiniti M45.

Any help is highly appreciated on this regard, thanks in advance.

[sihan]

Seems like after age your engine producing black smoke which is causing this black spot on body above the exhaust tip. Go for Bilstein engine cleaner that can renew the engine internal component like new one and will help stop black smoke, pinking and missing (if any)

Check with Emarat, Enoc and Eppco as i remember seing this sometime back, cant remember where.