The pollution that comes out from the exhaust system, it will more or less depending on the warning section of the air/fuel (air fuel ratio) that cause burns has quite the most complete. The purpose is to complete combustion with carbon monoxide and hydrocarbon compounds come out but will have minimal nitrogen oxide occurs most. This is because such conditions may cause oxygen best. In the opposite direction. If the ratio of air/oil dips. In this range, the result caused combustion to hydrocarbon compounds, and carbon monoxide, nitrogen oxides and, which say that the burning occurs prematurely.
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