What causes black smoke out of the tailpipe?

Does your car smell like an old dish rag or perhaps your teenage boys gym socks?

Why does my car have white smoke coming out of the tailpipe?

Are aftermarket parts as good as OEM? Welcome to Mercie J, where compassion and craftsmanship come together. I’m Rick Smith, master certified technician. There’s two answers of that. Yes and no. It really does depend on the part.

Is my car Obi-Wan Kenobi? Welcome to Mercie J Auto care where compassion and craftsmanship come together. I'm Rick Smith, master certified technician. Oh I guess it wasn’t Obi-Wan Kenobi. The question was, "Is my car OBD1 or OBD2? or not OBD?

Now the reason this question came up is because I have elderly parents and my wife and I were concerned about their oxygen levels and so she wanted to get one of those things that goes on your finger to measure the oxygen level in your blood, so she googled oxygen sensor.