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95 Grand Am rough running low oil pressure
Vehicle history as of late:
95 Grand Am SE 3.1L V6 w/ ~280,000km (174,000 miles).
We just had the radiator, heater core, and intake gaskets replaced due to coolant leaks. Seems the coolant issue is all under control now.
Last oil change we went from conventional to synthetic. When I got the intake gaskets replaced, I believe he also did an oil change. No idea what type of oil (synthetic or conventional) he put in it, trying to find that out. I believe the oil filter was also changed. Just thought I'd mention this since this has to do with oil pressure.
Issue I'm currently having:
It's my fiance's car. She was driving home from work last night and she said the car was running very rough, bumpy in the engine. Almost died on her a couple times getting home. Once she got home, it stalled before she could shut the ignition off (I'm assuming this problem gets worse when it idles).
When this happened, she said the oil pressure gauge was almost bottoming out.
I checked the engine oil, and the transmission fluid for kicks (since we replaced the rad recently). They both look fine.
Seems that when you first star the car, the exhaust is really thick white. Just seems to be a lot of exhaust vs. other vehicles.
Any idea what is causing the rough running/low oil pressure? When I tried to start the vehicle this morning, it started and the oil pressure was fine, but lots of thick white exhaust at first, and it seemed to idle bumpy, started rough.
I'm sick of fixing this vehicle, but what do I expect with such high mileage?