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#4585755 - 11/26/17 03:32 PM Base Viscosity of common oil question.
ZZman Offline


Registered: 03/17/08
Posts: 5478
Loc: Michigan
What is the base Viscosity of common oils like a 5w-20 or 30 before Viscosity modifiers are added?
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#4585886 - 11/26/17 04:59 PM Re: Base Viscosity of common oil question. [Re: ZZman]
Shannow Offline


Registered: 12/12/02
Posts: 38960
Loc: 'Stralia
Here's a mobil blend guide for their PAO product.



Calculating across
5.6, 5.3, 5.1, 7.0, 6.7, 6.9, 8

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#4585944 - 11/26/17 05:55 PM Re: Base Viscosity of common oil question. [Re: ZZman]
MolaKule Offline


Registered: 06/05/02
Posts: 18943
Loc: Iowegia - USA
For transmission Fluids, see slides starting at #40:

https://bobistheoilguy.com/automatic-transmissions-study/
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#4586263 - 11/27/17 04:26 AM Re: Base Viscosity of common oil question. [Re: Shannow]
weasley Offline


Registered: 03/13/13
Posts: 709
Loc: UK
Originally Posted By: Shannow

Calculating across
5.6, 5.3, 5.1, 7.0, 6.7, 6.9, 8


That is just the base oil viscosity - you're not accounting for the viscosity of the DI pack. Not sure if the OP wanted this or not.
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#4586265 - 11/27/17 04:38 AM Re: Base Viscosity of common oil question. [Re: weasley]
Shannow Offline


Registered: 12/12/02
Posts: 38960
Loc: 'Stralia
Originally Posted By: weasley
Originally Posted By: Shannow

Calculating across
5.6, 5.3, 5.1, 7.0, 6.7, 6.9, 8


That is just the base oil viscosity - you're not accounting for the viscosity of the DI pack. Not sure if the OP wanted this or not.


LOL, can only work with the tools I've got...but yes, you are 100% correct.

But even still, assuming the same DI pack, the trends are the same (same percentages), and the NOACK demonstrates it also

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