oil pressure at idle

[Bernie Benz]

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
>
>
>
>
> _______________________________________________
> 200q20v mailing list	 http://www.audifans.com/mailman/listinfo/200q20v