lower oil pressures with age

Kneale Brownson kneale at coslink.net
Mon Sep 5 23:57:46 EDT 2005

Mine's around 235K and seems the same as it's been the last several years.
Of course, I still use Dino oil.  I'm right at 2 bar when idling and 4.5 or
so bar at highway speeds when fully warmed if the level is near top.  I
have an oil pump gasket leak, so my level drops.  I'm losing about a quart
every 6-700 miles.

At 11:41 PM 9/5/2005 -0400, Brett Dikeman wrote:
>Anyone else ever noticed oil pressures drop with age?
>I was rather surprised this summer when oil pressures seemed VERY low  
>when warm; lower than I remember.  Sometimes below 2 bar at idle, and  
>it won't climb up to 4-5 bar until about 2,000 RPMs.  Hasn't improved  
>with a new filter and oil.  Used to be that it'd be dead on 2 bar at  
>idle when fully warmed up, and the slightest blip of the throttle  
>would send the oil pressure up to 5 bar; 1500 rpm was certainly  
>I had been told this is generally a warning sign of worn main  
>bearings- extra slop allows more oil to flow there.  However, the  
>suddenness/change with oil change leaves me wondering if it isn't a  
>change in Mobil 1 oil.
>Anyone?  I've got about 201k on the clock.
>"They that give up essential liberty to obtain temporary
>safety deserve neither liberty nor safety." - Ben Franklin
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