[R129 SL] R129LIST Digest, Vol 72, Issue 4

[Matthias Fouquet-Lapar]

I don't believe a W30 oil is not correct for high outside temperatures, you are risking major engine damage

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On 17 juil. 2011, at 18:15, r129list-request at mbcoupes.com wrote:


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>   1. Oil pressure question (Oldbenz1 at aol.com)

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> Message: 1

> Date: Sun, 17 Jul 2011 10:09:34 EDT

> From: Oldbenz1 at aol.com

> Subject: [R129 SL] Oil pressure question

> To: r129list at mbcoupes.com

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> My ;92 500SL exhibits a strange thing.  When the outside temperature  is 

> very high and engine coolant temp approaches 100C., the oil pressure drops to  

> very nearly zero at idle.  When engine RPM's are increased, the pressure  

> immediately increases to an acceptable level (between 2-3 atm).  The car  has 

> less than 61,000 miles, has always been properly maintained, and  I change 

> oil at 3000 mile intervals.  I use Valvoline 10W-30W  and change oil and 

> filter at 3000 mile intervals.   I find it  hard to believe this is normal-  

> does anyone have ideas what's going  on?  

> Rich Splaine   

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