Skip the auto shop - Our mechanics make house calls

Q: Exhaust smoke smells like gas or burning oil.

asked by on

I have blueish gray smoke coming from the exhaust of my car. It smells pretty strongly of gas or burning oil.

A: Hi there. The smoke coming out of your exha...

Hi there. The smoke coming out of your exhaust is most likely oil being burned through your engine. The oil gets into the cylinder by a few ways. The first way is for the oil to get by the oil control rings of the pistons. The engine's pistons would have to be removed and the rings replaced on each piston. Also, oil getting by the valve seals on the valves can cause the smell, which indicate the valve guides are worn. This would mean the heads have to be removed and rebuilt. The last cause is the engine has massive amounts of sludge and is clogging the oil entries. This would lead to the oil being sucked into the intake from lack of oil changes. All of these problems will require the engine to be checked and major repairs have to be done to fix it. I recommend you have a mechanic, like one from YourMechanic, inspect your vehicle's smoke issue to be on the safe side and eliminate any doubts.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: There's a smell when I drive my car is it the clutch? My car has 23000 miles.

Hi there: When a clutch is wearing out or gives off a smell, it's usually similar to rotten eggs or burning rubber if it's actual clutch disks. There will be other indicators such as slipping of the clutch once the...

Q: Check Engine Light with codes P219B and P0305

Hi there. The first code denotes an air fuel mixture ratio concern; and the second code, P0305, is a misfire detected on cylinder 5. There are several possible causes and both codes could be a related fault. An ignition coil,...

Q: Car is jerking for a while and then runs fine

The TCC is the torque convertor clutch solenoid inside the transmission. To get it replaced you would need to have the pan removed and the TCC solenoid tested and replaced. If all your drive issues start to happen after...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.