The color of your vehicle’s exhaust can tell you a lot about the health and condition of your engine. Different colors of exhaust indicate different issues, and can result in different types of repairs needed. With our vehicles being so complex, it can be difficult to determine what is wrong with your vehicle. So, wondering what to do when your Buick Regal has blue exhaust smoke? We’ll tell you what it means and what to do next!
What Color Should my Car’s Exhaust Be? 
Much like your body tells you what is wrong with the inside, based on what is coming out, your car can tell you what is wrong with the inner parts by the color of smoke coming from the exhaust. A healthy car shouldn’t be blowing colored smoke. In warm weather, gray, white, blue, or black smoke from your exhaust system can indicate an issue. However, in colder weather, your vehicle will still blow steam from your exhaust. That is simply because of the heat coming out, and not a reason for concern.
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The short list of colors that your smoke can blow is a great indicator of internal issues. Black smoke means your engine is burning too much fuel. Thick white smoke means your engine is leaking and burning coolant. Either of these smoke issues can result in a larger problem down the road, so it’s best to consult a technician.
Blue or Gray Exhaust Smoke 
If your vehicle has blue smoke coming out, it means that your engine is burning oil. When oil leaks past where it should be, it can be mixed with the fuel and burned in the combustion chamber. This often results in a smell accompanying the burning oil. If you are seeing blue smoke, check your oil levels frequently and watch out for rough starts. If you drive an old vehicle and the leak is minimal, your best bet is to top of your oil regularly. Newer cars, however, should not be burning oil and you should consult a professional.
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Gray smoke can also be an indicator of burning oil. It’s important to make sure that your vehicle is not burning large amounts of oil for a variety of reasons. Not only is it bad for the environment, but it is a problem that only gets worse with time. Catching the oil burning in the early stages could save you money in the long run.
