2. fuel combustion petroleum will not completely carbon and carbon oxide: CO2 and CO also has many other types of gas, such as SO2, H2S and NO2, including ashes with very few metal components.
2. burning petroleum fuel incompletely. Soot and oxides of carbon to CO and CO2 are also several other types of gases such as SO2, NO2 and H2S as well as the ashes with a little more volume metal components.
2. Burning petroleum fuels as incomplete. To soot and oxides of carbon, namely CO CO2 also gas and another types such as, and SO2 NO2 H2S including ash content very little metal components.