Skip the auto shop - Our mechanics make house calls

Q: Oil and gas smell when AC is on.

asked by on

The car smells like burnt oil or gasoline whenever the AC is on with the fresh air function. The car also consumes gas faster than normal. A quarter of a full tank depleted after 15 minutes of driving. In addition, oil seems to be leaking at the bottom.

This could be a serious issue and needs to be looked at immediately. It is possible a fuel leak has developed in the fuel supply or return line. This leaking fuel could be ignited and fire could result. The entire fuel system needs to be thoroughly inspected as it sounds like fuel is being directly leaked out. I would recommend that you enlist the help of a mechanic, such as one from YourMechanic, to look at the vehicle before operating it any more.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Weird smell from AC.

There is usually only two causes of this symptom. Inside your dash lies the evaporator for the air conditioning system. This evaporator looks like a small radiator but gets cold instead of hot. Imagine a soda can freshly opened out...

Q: The car sometimes takes more than one turn of the key to start.

Hello, thanks for writing in. If this problem is occurring and it is getting poor fuel mileage, then you more than likely have a fuel system problem. Most of the time this is caused by a bad fuel pressure regulator...

Q: Water leaking into floorboard

Locating water leaks can be tricky. The most common leak I come across is the drain for the AC evaporator that is located inside the car being clogged. The evaporator is the part of the AC system that cools the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...