Skip the auto shop - Our mechanics make house calls

Q: Engine hesitation and blue smoke

asked by on

My Mazda 3 had engine hesitation around 3,000 rpms and bluish smoke came out of the exhaust. I had just added a quart of 5W-20 oil (my dipstick is hard to read so I may have put too much oil in). This continued for several miles. Any help will be appreciated.

My car has 57000 miles.
My car has an automatic transmission.

The blue smoke coming out of the exhaust is an indication that the motor is burning excessive oil. The Mazda 3 engines are known for this. When the valve seals become worn this can cause oil to seep into the combustion chamber allowing it to be ignited with the air and fuel resulting in the blue smoke coming out of the exhaust and increased burning of oil. This is usually a sign of an engine that needs to be rebuilt. I would recommend having an expert from YourMechanic come to your home to diagnose and repair.

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: Is it bad when oil gets into the throttle body?

Hello, I believe what you are describing is a problem with your PCV valve. A bit of oil in the throttle body is not going to harm your motor and is certainly not going to cause it to blow up....

Q: COOLANT RESERVOIR IS STEAMING HOT

Hi there. Most of the time when you see "steam" coming from the overflow tank, it's due to higher than normal or overheating problems within the coolant system. As you know, when coolant and water reach "boiling temperature", water evaporates...

Q: Car hesitation and misfires

Hello. The most common cause of this is a tune up issue. If the spark plugs are worn then this can happen. If the check engine light is coming on I would typically start by scanning the computer for codes....

Related articles

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 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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...