A vehicle with black smoke from the exhaust is either running too rich ( fuel air mixture is incorrect ) or burning oil. If your vehicle is older and you keep having to add oil it is probably the...
Black smoke would usually be caused by oil getting into the combustion chamber. check and/or renew oil rings Edit: Oil normally is blue..unburnt fuel would be black
Exhaust soot is Carbon based molecules that have not reacted to completion in the combustion chamber.
We input Hydrocarbon, Air, and Exhaust gas (EGR), and hope that we burn all the hydrocarbon into...