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

asked by on December 22, 2016

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Transmission not going into gear

If the shifter will move, but there is no response from the transmission then it may indeed have a transmission failure. It can also be a broken shift cable. I have seen many of these fail on this vehicle. I...

Brake Pedal feels loose have to push all the way down pumping it helps stop it but mostly it keeps sliding until I pull E-brake.

Hello. After replacing any brake hose or line, the brake system has to be bled of any air. Did your friend do that after installing the hose? Try bleeding the entire brake system. If the seal under the brake fluid...

hearing loud clicking when I accelerate, when foot off gas, reduced sound, sometimes step on gas and its gone

Hi there. In most cases, a tapping sound will come from two areas; the top of the motor or the axle shaft area. With the engine, the tapping noise is either lack of oil lubrication in the top of the...

Related articles

Understanding the Pontiac Oil-Life Monitor and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Pontiac Oil Life Monitor (OLM) indicates when and what service your car needs.
Pontiac Certified Pre-Owned (CPO) Car Program
If If you’re in the market for a used Pontiac vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on...
How to Buy a Classic Pontiac
Whether you want to buy a classic Pontiac for yourself or as a gift, here are some tips on buying one for a great value.