Skip the auto shop - Our mechanics make house calls

Q: can overfilling the oil in a car cause oil on the spark plugs?

asked by on

Hello, i just switched my spark plugs out of my car today and found oil on them, does that mean that the past owner maybe overfilled the car with oil and it maybe got on the spark plugs somehow? Or do you think that it could be something else? Thanks

My car has 68000 miles.
My car has an automatic transmission.

The most common reason that you have oil on the spark plugs after you remove the coils is the valve gasket is leaking oil into spark plug wells. You will need to clean out the oil before replacing the spark plugs. The valve cover gasket should be replaced in order to stop the oil from getting into the spark plug wells anymore.

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
  1. Home
  2. Questions
  3. can overfilling the oil in a car cause oil on the spark plugs?

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: Huracan 5.0. creates white smoke on colder days

It probably is the valve seals. You want to hope it's not the head gasket blown. To check the head gasket is simple. I've got a video that tells you if your head gasket is blown. It's a simple test--the...

Q: Strong knocking from front driver's side and passenger side when making turns left OR right.

The steering rack and pinion assembly is mounted in rubber bushings; they may be deteriorated and allowing the rack and pinion to contact the sub frame making the knocking noise. The other component to look at is the struts...

Q: Fuel is leaking and Check Engine Light is on - 2008 Mazda 3

The fuel pump is contained within the tank and so cannot leak. You are probably seeing fuel leaking from a fuel line and/or from the fuel tank itself. There could be a loose fuel line fitting, impact damage (debris from...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...