oil pressure at idle

[robert weinberg]

thanks bernie,

my question was it was always 2 bar - now, all of a sudden after the oil change, it's 1.5 bar. just making sure 1.5 bar is okay. 

and i wasn't aware that i was unemployed ;-)

Robby




________________________________
From: Bernie Benz <b.benz at charter.net>
To: robert weinberg <centaurus3200 at yahoo.com>
Cc: 200q20V mailing list <200q20v at audifans.com>
Sent: Sun, March 21, 2010 8:55:52 PM
Subject: Re: oil pressure at idle

Robby,
Your problem IMO is that you don't have anything of substance to worry about and maybe need to find a job.
Your reduced oil viscosity should be expected to reduce idle pressure. So what?

The principle purpose of the large oil circulation in an engine is cooling, piston and bearing, not lubrication. Thus, oil circulation volume is of import, not pressure. Oil gallery pressure has no effect upon fully supplied friction bearing performance but the excess does contribute to bearing cooling. In short, low oil pressure is good, no oil pressure is bad.

Bernie



On Mar 18, 2010, at 10:42 AM, robert weinberg wrote:

> hi all,
> 
> historically my oil pressure is about 2 bar at idle - hits 5 bar pretty quick once you build rpms.
> 
> driving home yesterday from work - i noticed that by the time was was nearly home - at a stoplight, the pressure was about 1.5 bar. i usually put 20/50 in the car - but i'm sure the mechanic put 10/40 in it, despite my request for 20/50. car doesn't burn oil - such as it's MAYBE 1/2 quart low after 3k miles. the oil was changed only a few hundred miles ago. i checked it after it was changed - it was full. no leaks under the car or anything.
> 
> is 1.5 bar at idle a problem?
> 
> Robby
> 
> 
> 
> 
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