High VI and Base Stocks
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Link to related thread: https://www.bobistheoilguy.com/forums/ub...s_s#Post2225421
Here is an interesting one: Amsoil Briggs & Stratton Synthetic 4T Racing Oil
https://www.amsoil.com/shop/by-product/m...-4t-racing-oil/
KV100: 11.6
KV40: 72.2
Density: 0.9059 (very dense; I think it has a lot of ester and/or PAG)
HTHS: 4.2
KV150: 4.82
Density correction factor: 0.885
Harman Index: 1.02
Compare that one to the two Amsoil oils below.
Amsoil Z-Rod 10W-30
https://www.amsoil.com/shop/by-product/motor-oil/gasoline/z-rod-10w-30-synthetic-motor-oil/
11.8
74.9
0.8644
3.6
4.87
0.885
Harman Index: 0.835
Amsoil Signature Series 10W-30
https://www.amsoil.com/shop/by-product/m...etic-motor-oil/
10.0
62.3
0.8644
3.11
4.19
0.885
Harman Index: 0.839
Viscosity calculator used: http://www.nimacltd.co.uk/viscosity-calc...wo-temperatures
Here is an interesting one: Amsoil Briggs & Stratton Synthetic 4T Racing Oil
https://www.amsoil.com/shop/by-product/m...-4t-racing-oil/
KV100: 11.6
KV40: 72.2
Density: 0.9059 (very dense; I think it has a lot of ester and/or PAG)
HTHS: 4.2
KV150: 4.82
Density correction factor: 0.885
Harman Index: 1.02
Compare that one to the two Amsoil oils below.
Amsoil Z-Rod 10W-30
https://www.amsoil.com/shop/by-product/motor-oil/gasoline/z-rod-10w-30-synthetic-motor-oil/
11.8
74.9
0.8644
3.6
4.87
0.885
Harman Index: 0.835
Amsoil Signature Series 10W-30
https://www.amsoil.com/shop/by-product/m...etic-motor-oil/
10.0
62.3
0.8644
3.11
4.19
0.885
Harman Index: 0.839
Viscosity calculator used: http://www.nimacltd.co.uk/viscosity-calc...wo-temperatures
It's not available in the U.S but over here in Europe we have Valvoline Vr1 10W-60, same specs as the regular 20W-50 ( SM, A3/B4 ) but it's a Semi-Synthetic / Syn-Blend.
Don't think i've seen any 10W-60 other than that that was not full synthetic, i know somebody who uses it and has no problems at all, it must shear pretty quickly though.
Don't think i've seen any 10W-60 other than that that was not full synthetic, i know somebody who uses it and has no problems at all, it must shear pretty quickly though.
Originally Posted By: JAG
Link to related thread: https://www.bobistheoilguy.com/forums/ub...s_s#Post2225421
Here is an interesting one: Amsoil Briggs & Stratton Synthetic 4T Racing Oil
https://www.amsoil.com/shop/by-product/m...-4t-racing-oil/
KV100: 11.6
KV40: 72.2
Density: 0.9059 (very dense; I think it has a lot of ester and/or PAG)
HTHS: 4.2
KV150: 4.82
Density correction factor: 0.885
Harman Index: 1.02
Compare that one to the two Amsoil oils below.
Amsoil Z-Rod 10W-30
https://www.amsoil.com/shop/by-product/motor-oil/gasoline/z-rod-10w-30-synthetic-motor-oil/
11.8
74.9
0.8644
3.6
4.87
0.885
Harman Index: 0.835
Amsoil Signature Series 10W-30
https://www.amsoil.com/shop/by-product/m...etic-motor-oil/
10.0
62.3
0.8644
3.11
4.19
0.885
Harman Index: 0.839
Viscosity calculator used: http://www.nimacltd.co.uk/viscosity-calc...wo-temperatures
Somehow you've got all of them wrong and way off. How come no one has corrected you? Where is Shannow when there is a false calculation for real, as opposed to criticizing my BOQI calculations at every opportunity?
A_Harman index = HTHSV / (KV150 * density @ 15 C * 0.885)
(KV150 is extrapolated using the Widman operational-viscosity calculator or such. The factor 0.885 is for the density extrapolation.)
Amsoil Briggs & Stratton Synthetic 4T Racing Oil
A_Harman index = 1.09
(Since A_Harman index can't be greater than 1, something is obviously wrong here. Assuming that all the data is correct, the culprit would be the viscosity and/or density extrapolation to 150 C.)
Amsoil Z-Rod 10W-30
A_Harman index = 0.966
Amsoil Signature Series 10W-30
A_Harman index = 0.970
Link to related thread: https://www.bobistheoilguy.com/forums/ub...s_s#Post2225421
Here is an interesting one: Amsoil Briggs & Stratton Synthetic 4T Racing Oil
https://www.amsoil.com/shop/by-product/m...-4t-racing-oil/
KV100: 11.6
KV40: 72.2
Density: 0.9059 (very dense; I think it has a lot of ester and/or PAG)
HTHS: 4.2
KV150: 4.82
Density correction factor: 0.885
Harman Index: 1.02
Compare that one to the two Amsoil oils below.
Amsoil Z-Rod 10W-30
https://www.amsoil.com/shop/by-product/motor-oil/gasoline/z-rod-10w-30-synthetic-motor-oil/
11.8
74.9
0.8644
3.6
4.87
0.885
Harman Index: 0.835
Amsoil Signature Series 10W-30
https://www.amsoil.com/shop/by-product/m...etic-motor-oil/
10.0
62.3
0.8644
3.11
4.19
0.885
Harman Index: 0.839
Viscosity calculator used: http://www.nimacltd.co.uk/viscosity-calc...wo-temperatures
Somehow you've got all of them wrong and way off. How come no one has corrected you? Where is Shannow when there is a false calculation for real, as opposed to criticizing my BOQI calculations at every opportunity?
A_Harman index = HTHSV / (KV150 * density @ 15 C * 0.885)
(KV150 is extrapolated using the Widman operational-viscosity calculator or such. The factor 0.885 is for the density extrapolation.)
Amsoil Briggs & Stratton Synthetic 4T Racing Oil
A_Harman index = 1.09
(Since A_Harman index can't be greater than 1, something is obviously wrong here. Assuming that all the data is correct, the culprit would be the viscosity and/or density extrapolation to 150 C.)
Amsoil Z-Rod 10W-30
A_Harman index = 0.966
Amsoil Signature Series 10W-30
A_Harman index = 0.970
Thank you, Gokhan for correcting my errors. I did that all using my phone and apparently it was beyond my capabilities at the time. Why nobody else corrected me? I don’t know. I’d rather be corrected than not. Why have you caught grief? I think it’s just a personality clash. Don’t let it stop you from posting. I enjoy the thought and knowledge exchanges.
Originally Posted By: JAG
Thank you, Gokhan for correcting my errors. I did that all using my phone and apparently it was beyond my capabilities at the time. Why nobody else corrected me? I don’t know. I’d rather be corrected than not. Why have you caught grief? I think it’s just a personality clash. Don’t let it stop you from posting. I enjoy the thought and knowledge exchanges.
No worries. It looks like you forgot to multiply by the density. Or perhaps you both multiplied and divided, and it canceled out.
Thank you, Gokhan for correcting my errors. I did that all using my phone and apparently it was beyond my capabilities at the time. Why nobody else corrected me? I don’t know. I’d rather be corrected than not. Why have you caught grief? I think it’s just a personality clash. Don’t let it stop you from posting. I enjoy the thought and knowledge exchanges.
No worries. It looks like you forgot to multiply by the density. Or perhaps you both multiplied and divided, and it canceled out.
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Originally Posted By: OilUzer
very informative thread!
I've now added Harman index to the list of new things to worry about ...
I created a shared spreadsheet of it ages ago:
Harman Index Calculator
Feel free to use it.
very informative thread!
I've now added Harman index to the list of new things to worry about ...
I created a shared spreadsheet of it ages ago:
Harman Index Calculator
Feel free to use it.
Originally Posted By: Gokhan
Somehow you've got all of them wrong and way off. How come no one has corrected you? Where is Shannow when there is a false calculation for real, as opposed to criticizing my BOQI calculations at every opportunity
OK, your call...
As I keep saying...the BOQI does nothing that you say it does,
* doesn't represent hydrolytic stability,
* doesn't even give the same "quality index" for three 100% PAO basestocks in the same family, nor 6 oils blended with them,
* does not represent the context of the patents that you claim support them.
re the Harman Index, it is the ratio if the HTHS to the theoretical 150C viscosity were the oil a Newtonian oil and not have temporary polymeric shear non Newtonian effects. It has a sound theoretical basis...and claims nothing more than demonstrating the non-Newtonian behaviour of an oil.
You are confusing the two issues.
If I divide the viscosity by the vapour pressure and divide by NOACK, I have a meaningless number, regardless of how "correctly" and accurately I calculate it.
Somehow you've got all of them wrong and way off. How come no one has corrected you? Where is Shannow when there is a false calculation for real, as opposed to criticizing my BOQI calculations at every opportunity
OK, your call...
As I keep saying...the BOQI does nothing that you say it does,
* doesn't represent hydrolytic stability,
* doesn't even give the same "quality index" for three 100% PAO basestocks in the same family, nor 6 oils blended with them,
* does not represent the context of the patents that you claim support them.
re the Harman Index, it is the ratio if the HTHS to the theoretical 150C viscosity were the oil a Newtonian oil and not have temporary polymeric shear non Newtonian effects. It has a sound theoretical basis...and claims nothing more than demonstrating the non-Newtonian behaviour of an oil.
You are confusing the two issues.
If I divide the viscosity by the vapour pressure and divide by NOACK, I have a meaningless number, regardless of how "correctly" and accurately I calculate it.
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