If you pay attention to the quality of your car's exhaust system you can get an idea of what's going on inside the engine. As the engine burns fuel and creates exhaust, lots of different things are happening. Unfortunately some of these things aren't supposed to happen. Things like burning oil, evaporating coolant and leaving unburned fuel in the exhaust. It could just be a worn out muffler, but it’s hard to know without an inspection.

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