black smoke comes from the exhaust

1996 MITSUBISHI MIRAGE
129,000 MILES
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JUANBATIS
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black smoke comes from the exhaust. I just changed motor oil and filter but still smoke is coming black. I bought this vehicle 3 days ago and the motor oil was so bad. I think the former owner never change the motor oil.
Jun 19, 2013 at 6:05 PM
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DOCHAGERTY
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Black smoke is usually from too much fuel being injected into the engine
Jun 19, 2013 at 6:19 PM
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FREEMBA
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Is the check engine light on? If so, have the computer scanned for codes. There are some auto parts stores which will do this for free. Once you have the codes [if any are present], post them here for further assistance.

the engine oil has nothing to do with the black smoke. However, it is a good thing you changed it; now you can begin tracking you maintenance.
Jun 19, 2013 at 7:16 PM
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