Skip the auto shop - Our mechanics make house calls

Q: There is smoke coming from my car.

asked by on

i do top up engine oil once every month and smoky
My car has an automatic transmission.

If you are having to top off the oil once a month, depending on how many miles you drive per month, this may suggest that your engine is burning the oil. If the smoke is a blue colored smoke, this is an indication that the oil is being burnt with the fuel. When this happens, it is usually due to worn piston rings allowing the oil to pass by the pistons up into the combustion chamber.

This can also happen when the valve guide seals are bad, resulting in oil from the valve train leaking down into the combustion chamber as well. I would recommend having an expert from YourMechanic come to your location to inspect for the source of the smoke and suggest any needed repairs.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Overheating and Wont start

Hello. The symptoms you are describing likely stem from a blown head gasket(s). To have this diagnosed definitely will require an on-site inspection.

Q: Smell smoke when starting

The smell of smoke may indicate that you have a slight oil leak on your engine somewhere. The hood will get hot, and this is normal. The engine compartment can be 200 degrees fahrenheit or maybe even a little hotter....

Q: My engine is vibrating and making a knocking sound at idle, which grows intensely when I accelerate but it all goes away at times

This seems to be a torque converter issue. The bolts are probably loose between the converter and the flex plate. To get to the torque converter bolts, you will need to remove the starter from the engine and then you...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.