Skip the auto shop - Our mechanics make house calls

Q: OIL CHANGE PROBLEM - 2009 PONTIAC G6 V6 3.5L

asked by on

After the car was warm from driving for about an hour I completely emptied the oil, changed the filter, and refilled the car with 4 quarts of oil. I drove it a few blocks then checked the oil level and it was perfect. The next day after driving about a half hour oil is now showing extremely high on the dipstick. This happened last time I changed the oil as well. Any ideas why? The book says 4 quarts is the correct amount. Should I take some oil out? If so it would have less than 4 quarts... Any input is appreciated. Thanks!
My car has an automatic transmission.

Hi There, There are a few different possibilities at play here. Your oil pump has a pressure relief valve that can sometimes get stuck and cause the oil pressure to remain higher than normal for an extended period of time. The other possibility may be a slightly different viscosity of oil may have been used which can increase oil pressure. Lastly, you may have a malfunctioning oil pressure sending unit which may simply providing false readings. I would recommend having a professional from YourMechanic come to your location to take a look at your car to narrow down what may be causing such high oil pressure.

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: What is the cost for water pump replacement

In order to replace the water pump you must first remove the passenger front wheel and the splash guard behind it. Then you must remove the serpentine belt from the engine. Once the serpentine belt is removed, you must been...

Q: Rear power door locks not working

Hi. The body control module (BCM) takes input from the door lock switches and in turn, controls the door lock actuators. These actuators lock and unlock your doors. Looking at the wiring diagram for your vehicle, I don't see that...

Q: Blown engine

Check you dipstick to make sure that the proper amount of oil was installed. It's possible that someone forgot to re-fill the engine oil. It could also just be a coincidence that the Check Engine Light came on after the...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...