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Evonik Viscoplex Calculators - Present for Gokhan #5081145 04/20/19 08:17 PM
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Shannow Offline OP
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Trying to re-gather lost files after computer failure (too long between back-ups, not enough that it really hurts), and found some great data sheets from Evonik...went looking for the source data, and any updates, and they have this...

https://oil-additives.evonik.com/product/oil-additives/resources/blending-efficiency-en.html

A blending calculator, where you can put the base oil viscosity in, pick a target KV100, and it spits out how much Viscosity Modifier to use...or back the other way...

[Linked Image]


If it's the truth....it can handle the pressure !!!
Re: Evonik Viscoplex Calculators - Present for Gokhan [Re: Shannow] #5081168 04/20/19 08:40 PM
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gathermewool Offline
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Is that percentage compared to the entire add pack?

It can’t be compared to the base oil...can it?


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Re: Evonik Viscoplex Calculators - Present for Gokhan [Re: Shannow] #5081170 04/20/19 08:42 PM
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Shannow Offline OP
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It's just base oil and VII


If it's the truth....it can handle the pressure !!!
Re: Evonik Viscoplex Calculators - Present for Gokhan [Re: Shannow] #5081191 04/20/19 09:17 PM
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Shannow Offline OP
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So when messing with (say) the mobil blend guide, it's the percentage of the base oil component not the entire bottle contents.


If it's the truth....it can handle the pressure !!!
Re: Evonik Viscoplex Calculators - Present for Gokhan [Re: Shannow] #5081511 04/21/19 09:18 AM
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gathermewool Offline
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That's still a lot. I never realized!


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (2nd OFI) (77,760mi, 3/7/20)
15 Legacy Premium FB25
Magnatec 0W-20 D1G2+ FU filter (2nd OFI) (54,621mi, 3/4/20)
Re: Evonik Viscoplex Calculators - Present for Gokhan [Re: Shannow] #5165715 07/19/19 07:15 PM
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Gokhan Offline
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I just saw this, thanks!

The amount of raw (solid) VII (VM) polymers used in oils are only about 1 - 2% for all VII types except the polymethacrylate (PMA) VII, which is 5 - 6%.

The rest of the VII sold commercially is a solvent (such as Group I base oil) used to dissolve the solid VII polymers so that it can be readily dissolved in the finished oil. In theory you can also dissolve the solid polymer in the finished oil but in practice that could give the blenders a huge headache and it's much easier to buy already-oil-dissolved polymers instead.

Yes, as your plot indicates, the relation between the VII content and viscosity is fairly linear, which is what I assume in my calculations.

The recent pair of papers by Hugh Spikes et al. discussed in this thread studies VIIs in full glory, with the Part II focused on fuel economy:

https://www.bobistheoilguy.com/foru...y-hthsv-friction-and-wear-state-of-the-a


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