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Do you smell something unusual every time you get in your car? If so, it's important that you determine the source of the smell. To help you with this task, learn about the reasons for bar car smells in this post by USA Synthetics.

When you enter your vehicle and notice an unpleasant smell, your first reaction might be to check if there is a bag with old food or something of the kind lying around. However, there are many reasons for bad car smells. It could even have to do with a problem with your engine. To help you identify the source of the bad smell in your vehicle, USA Synthetics in Oklahoma City has this article for you today.

Sweet Smell

If the smell inside your vehicle is sweet, there is a chance that a coolant containing ethylene glycol could be leaking. Specifically, it could be leaking from the cylinder head, radiator, or a failed intake manifold gasket. However, if the smell is more prominent when you are inside the vehicle, there could be an issue with the heat core. In either case, if you notice a sweet smell emitting from your vehicle, you must take it to a mechanic to get your engine checked out.

Rotten Eggs

The catalytic converter, which is a crucial part of the fuel system inside your vehicle, has the job of converting hydrogen sulfide in your engine's exhaust into sulfur dioxide. If you smell something similar to rotten eggs when you are inside your vehicle, this could be a sign that your catalytic converter is not doing its job properly. Also, this smell can be caused by damaged fuel filters or fuel pressure sensors. When these parts get damaged, a sulfur gas can leak out and creep its way into your vehicle's cabin, leaving a smell similar to rotten eggs.

Along with getting rid of your car's bad smells, make sure to keep your engine protected. Learn about amazing products like AMSOIL's Signature Series 5W-20 Synthetic Motor Oil by speaking to a professional at USA Synthetics. Ask about the benefits of a synthetic oil change in Oklahoma City by calling (405) 388-6170 today.

Musty Smell

If you notice a musty smell inside your vehicle, take a close look at your carpets. Sometimes carpets get wet, and without proper care, they can give off an uncomfortable smell. If your carpets are dry, turn on your air conditioner. If the musty smell increases, the problem probably comes from your air-conditioning system. It is natural for moisture to collect on the air-conditioning evaporator, which as a result can lead to the formation of mold or mildew. If this is the case, try running only the fan at high speed while the air-conditioning is off. Doing this can allow the evaporator to clear the mildew. However, make sure to visit a professional if the musty smell persists.


A burnt smell is sometimes caused by a leak inside the engine, allowing oil to fall onto a hot part or surface. Another option is that your brake pads or rotors are overheated due to wear and tear or aggressive braking. A great tip is to open up your hood and look for any dried leaves, dirt, trash, rodents, or any other element that could be trapped and could burn from being exposed to hot surfaces, thus causing the smell.

Make sure to give your vehicle frequent maintenance, so it stays in top condition. Speak to a professional at USA Synthetics and learn about the benefits of a synthetic oil change in Oklahoma City. For more information about amazing AMSOIL products, visit the online store or call (405) 388-6170 today.


When do you notice the smell of gas? If you notice it when your vehicle is parked, gas could be leaking from the tank, or you might be dealing with a problem with your fuel system. If you notice the smell after your engine is warm, the evaporative emissions control system could be leaking, releasing the fuel vapors. However, if you notice a smell of gas when your engine is cold, it can be due to incomplete combustion, which is normal.

Exhaust Smell in Interior

Exhaust smell is definitely a smell you should never have inside your car. If it happens, however, it can indicate a leak in your car's exhaust system. Exposure to this smell can be detrimental to your health, so ensure to get your vehicle checked right away.

Give Your Engine a Synthetic Oil Change in Oklahoma City

Besides getting rid of the smells inside your car, learn about the best products for your engine. With AMSOIL's Signature Series 5W-20 Synthetic Motor Oil, your engine will have enhanced performance. Speak with an expert at USA Synthetics and learn about the benefits of a synthetic oil change in Oklahoma City. For more information, visit the online store or call (405) 388-6170 today.

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Oklahoma City, OK 73112 
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