Quote:
Originally Posted by bourman
I have a 1998 S500 with 62K miles. I just noticed that the oil pressure has dropped off some from normal. Usually the pressure is at #3 on the gauge and maybe #2 at idle.
Now it is at #2 below 45mph and #1 at idle. I'm running 10w30 Mobil 1 (can't find 10w40 anymore except for extended mileage).
What number does your S500 read at normal driving and idle (hot)?
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I think that oil (10W30) is a bit "light" for your car.
I used 20W50 dino oil for years until about 6 months ago, I switched to 10W40 synth oil (Lubro Moly) and I immediately saw the oil pressure change; now it runs at #3 while in motion but after the engine is hot and idleing, the oil pressure as around 1-1/2 which is the min spec for oil pressure.
As deanyel wrote, the numbers sound about right.