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Join Date: Sep 2005
Location: South West GB
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Oil Pressure on 930 were should it be at?.

Hello, all when running on idle what should the gauge say inside the car is it up near the 4/5 area on the dash. Also when you are driving the car what should it be as well please?.

Thank you all for your time and help.

911/930 turbo 87
Old 03-25-2010, 07:53 AM
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elvision930
 
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Join Date: Mar 2010
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Hmmm. Mine is lower at idle. 2/3. That is the druck press gauge. It makes sense that it should be. I would think. Ah...then when you open it up or hit boost the pressure should go up. 4/5. mine just spikes there momentarily then drops down when I slow down. I think this is normal. No expert though.

Check out this link below. I googled it and it seems on par. This gentlemen had his druck press drop. Normal freeway speeds it read 5 dropped to 3.5.

question about oil pressure drop.
Old 03-25-2010, 08:39 AM
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Depends on the engine mileage, oil type etc. I use 20W50 dyno oil in my car with 250,000km (150,000 miles) on it (no rebuild). Pressure at cold startup idle is about 3-4 bar, warm idle is about 1 bar, fully warmed up the oil pressure is about 1+ bar per 1000 rpm (3 bar at 2,200 4 bar at 3,000 rpm +). From what I understand warm idle pressure is not too important and on a hot day with moderately high engine temps it may show just below 1 bar - enough to cause the warning light to flicker on occasionally, but as long as the pressure follows the 1 bar per 1,000 rpm rule of thumb then there's nothing to worry about. You need to get very worried and shut down immediately if there is a sudden pressure drop and the red idiot light comes on.

When these engines were new the pressure was probably pegged at 5 bar on cold start and anything above 2,000 rpm, but as the engine wears the pressure will gradually reduce.

Last edited by Richard930; 03-25-2010 at 11:52 AM.. Reason: Clarify running pressure
Old 03-25-2010, 11:50 AM
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At idle, after warm up, it should be 1 bar and 1 bar/1k rpms after that. At 5k rpms it should at 5bars or close to. If the car is hot, at idle it could be a tad below 1.
Old 03-25-2010, 04:06 PM
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