'07 A3 2.0t Oil Consumption

[John Cody Forbes]

I have no explanation for it, but in the morning I can take a video of one 
of the Porsche's here (they have 3 separate relief valves, IIRC the highest 
is at 6bar) making 140psi of oil pressure at ~2000rpm, then tapering down to 
~80psi when it warms up. My only thoughts is that it must either overcome 
the volume capacity of the relief valve or overcome the spring in the relief 
valve (maybe a combination).

-Cody

--------------------------------------------------
From: "Huw Powell" <audi at humanspeakers.com>
Sent: Thursday, March 25, 2010 4:11 PM
To: "Cody Forbes" <cody at 5000tq.com>
Cc: "Jeffrey Brown" <jeffrey.r.brown at gmail.com>; "Quattro list" 
<quattro at audifans.com>
Subject: Re: '07 A3 2.0t Oil Consumption

>
>> Thicker oil provides more  protection, but doesn't get in some of the 
>> tight tolerance areas that  newer engines have as well as bringing the 
>> oil pressure dangerously  high on cold mornings
>
> How can that be when there is a 5 bar pressure relief valve in the oil 
> pump?
>
> -- 
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/