Join Date: Dec 2006
Location: W Lafayette, IN
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Oil Light and Low Pressure
05 6sp Se-r with 65k miles. Full synthetic oil every 7k miles, plus oil analysis at each change. About 4k miles since last change. Never had any signs of leaking and typically burn 0.5 quart over 5k miles.
Over the past 1-2 week period, I've notice more noise at cold start up than usual. Kinda odd since it summer. It only happens in the morning after sitting all night. My garage has a level floor. Then a couple days ago, the oil light flashed as I was pulling into the garage. I checked the oil and it was on the low side, but not bad. I added a half quart of oil, left over from the oil change. I typically add this at 5k miles. This brought the level to full. Still have the noise at start up and then today as I was coming through the parking lot at work, the oil light flickered again. I went back out at lunch and checked the oil. It is still full.
After sitting 4 hours, pressure was just over 60 at start up. Slowly dropped and leveled out about 40ish. Pressure drops to 0 at idle (7k rpm) though. No light. I don't think it is truly 0, but the gauge isn't very precise. It raises and lowers and appears to be correct. My first thought was oil pump, but it isn't consistent and 99% of the time pressure seems right.
So, I'm not sure what is going on. I picked up a new sensor and a test gauge. Thinking about checking the dash pressure against pressure gauge and figured I'd swap the sensor since it has to come out anyway. Does the small sensor by the oil drain plug provide the signal to the dash gauge and the low pressure indicator light?
I've read many of the low pressure posts here and none sound too good, but I'm not sure I'm in the same situation. Other than the 2 times the light has flickered and the 2-3 seconds of rattle on cold starts, it runs great. I'll probably just watch more closely for the next 1-2000 miles and then get an oil analysis and change the oil and filter. And no - its not a heat shield, I removed that already.
Just enough mods to make it mine.