Skip the auto shop - Our mechanics make house calls

Q: Bluish exhaust smoke upon startup

asked by on

My car has gone 130,000 miles. The car runs well. However, it makes white to bluish-colored smoke each time I start it. It comes from the exhaust in huge amounts. I had the oil checked and it is at an appropriate level. What might cause the smoke?

A: With higher mileage like your vehicle has, ...

With higher mileage like your vehicle has, the exhaust valve stem seals wear, allowing a tiny amount of oil to seep onto the exhaust valve while the car is sitting. When you start it up, this oil is burned up (clogging the catalytic converter as well), and causing the blue smoke you see briefly. If you would like to have this looked at, a certified technician from YourMechanic can come to your car's location to diagnose the smoke problem and figure out what fixes are appropriate.

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: Rear brake light, and some interior lights don't come on unless I'm braking

Hello. Replacing the stop light socket with a new one should have solved the intermittent problem of the stop light not working all of the time. It is possible that when you tweaked the socket, it caused a short to...

Q: Idles fine when reving the engine it makes a popping noise back fire from tail pipe

The backfire can be can be caused by a few possibilities. From what you've described, about the popping out of the tailpipe, you either have excessive amounts of air getting into the exhaust, a bad exhaust valve, or a spring...

Q: What does the engine oil pressure light mean in a 2012 Ford Explorer?

The engine oil pressure Warning Light is located on the instrument panel. This light illuminates when your engine’s oil pressure is below the minimum level. Operating your vehicle with an insufficient amount of oil is very dangerous, so you should...

Related articles

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.