Mobil 1 oil weight - with the link - pls read before continuing.

[Grant Lenahan]

>> 2.) Research has shown that to maintain oil flow, and thus good 
>> lubrication, almost all oils are too thick until operating 
>> temperature, at least, is reached. read Dr. Haas' articles (all 10 of 
>> them) before countering this.
>>
> Counter what?  That's why multi-vis oils were developed.
No, you are missing my point, and Haas'.   If you find his NUMBERS 
wrong, fine. But he specifically offers data to disprove that multi-vis 
is sifficient.  All oils, even 0W-20, are too thick until oil 
approaches 100degC.  Multi-weight as today, is insufficient. That is 
the point I have been trying to make. Please read the paper - i'm 
trying to help out with info that really convinced me.
>>
>>
> Again, the reason for multi vis oils.  Your premise is that you will 
> always have better flow/fluid transport with lower vis oils.  That 
> isn't true.
Yes it is.  if you dont believe me, read Haas' paper, and the recent 
SAE paper on low-temp flow.  If you dont have access to SAE papers, 
read Haas' summary, he posted it on Ferrari chat.

> Look at what you said, "with insufficient pressure and pump 
> volume"...There are the proviso's...do you think Porsche, Audi, 
> Ferrari, MB ensured that there oil pumps were designed to provide the 
> pressure and flow requirements for the oils specified?

You apparently have not read the article I pointed you too, whcih has 
all these data, and makes  my point.  If you disagree, and you sound 
pretty familiar with the principles, counter his numbers with yours.  
In fact, he uses real pressure and flow data from his 575 maranello.  
So the quick answer is "yes, I do think that, and in fact, Haas 
demonstrates that with measurements"

http://63.240.161.99/motoroil/

Read it and come back. I listen, btu I want to see these specifically 
contradicted or supported.

Grant