SAE viscosity vs actual
- Thread starter jkhawaii
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Good observation...it is a curve.
MolaKule
Staff member
https://www.bobistheoilguy.com/viscosity-charts/
The viscosity and VI curves are based on logarithmic functions with curve fitting.
The viscosity and VI curves are based on logarithmic functions with curve fitting.
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Originally Posted by JLTD
Good observation...it is a curve.
I don't know why my full post did not appear. You can graph oils here:
https://www.widman.biz/English/Calculators/Graph.html
Good observation...it is a curve.
I don't know why my full post did not appear. You can graph oils here:
https://www.widman.biz/English/Calculators/Graph.html
MolaKule
Staff member
First of all, this thread was started in the wrong Forum (White Papers and Technical Discussion) and you made at least two dupe posts.
The White Papers and Technical Discussion Forum and Question of the Day Forum are Monitored and Moderated which means responses go into a queue awaiting approval and responses may or may not show up in those forums depending on the relation to the subject content.
This procedure was announced early last year as I recall.
The White Papers and Technical Discussion Forum and Question of the Day Forum are Monitored and Moderated which means responses go into a queue awaiting approval and responses may or may not show up in those forums depending on the relation to the subject content.
This procedure was announced early last year as I recall.
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Originally Posted by MolaKule
First of all, this thread was started in the wrong Forum (White Papers and Technical Discussion) and you made at least two dupe posts.
The White Papers and Technical Discussion Forum and Question of the Day Forum are Monitored and Moderated which means responses go into a queue awaiting approval and responses may or may not show up in those forums depending on the relation to the subject content.
This procedure was announced early last year as I recall.
Ok, I was trying to find the best section for the topic. What do you mean by dupe posts?
First of all, this thread was started in the wrong Forum (White Papers and Technical Discussion) and you made at least two dupe posts.
The White Papers and Technical Discussion Forum and Question of the Day Forum are Monitored and Moderated which means responses go into a queue awaiting approval and responses may or may not show up in those forums depending on the relation to the subject content.
This procedure was announced early last year as I recall.
Ok, I was trying to find the best section for the topic. What do you mean by dupe posts?
Originally Posted by JLTD
Originally Posted by JLTD
Good observation...it is a curve.
I don't know why my full post did not appear. You can graph oils here:
https://www.widman.biz/English/Calculators/Graph.html
Interesting
Originally Posted by JLTD
Good observation...it is a curve.
I don't know why my full post did not appear. You can graph oils here:
https://www.widman.biz/English/Calculators/Graph.html
Interesting
Originally Posted by MolaKule
First of all, this thread was started in the wrong Forum (White Papers and Technical Discussion) and you made at least two dupe posts.
The White Papers and Technical Discussion Forum and Question of the Day Forum are Monitored and Moderated which means responses go into a queue awaiting approval and responses may or may not show up in those forums depending on the relation to the subject content.
This procedure was announced early last year as I recall.
Thanks yeah I recall the announcement, I guess I was trying to post prior to OP's first post being approved. Mystery solved thanks.
/hijack
First of all, this thread was started in the wrong Forum (White Papers and Technical Discussion) and you made at least two dupe posts.
The White Papers and Technical Discussion Forum and Question of the Day Forum are Monitored and Moderated which means responses go into a queue awaiting approval and responses may or may not show up in those forums depending on the relation to the subject content.
This procedure was announced early last year as I recall.
Thanks yeah I recall the announcement, I guess I was trying to post prior to OP's first post being approved. Mystery solved thanks.
/hijack
so, it seems manufactures use of the SAE ratings are pretty loose, with the KV100 viscosity being the most important and the KV40 not really mattering much. For example, (lucas not being well regarded in the first place) Lucas 50w syn actually has a lower viscosity at both KV40, and KV100 than the 20w50 Valvoline syn I use now.
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MolaKule
Staff member
Originally Posted by jkhawaii
...What do you mean by dupe posts?
The reference was to JLTD's sending Duplicate posts into the queue.
It is not necessary to do that. As I stated above, any posts sent into those two forums go into a holding queue for examination.
...What do you mean by dupe posts?
The reference was to JLTD's sending Duplicate posts into the queue.
It is not necessary to do that. As I stated above, any posts sent into those two forums go into a holding queue for examination.
MolaKule
Staff member
Originally Posted by jkhawaii
so, it seems manufactures use of the SAE ratings are pretty loose, with the KV100 viscosity being the most important and the KV40 not really mattering much. For example, (lucas not being well regarded in the first place) Lucas 50w syn actually has a lower viscosity at both KV40, and KV100 than the 20w50 Valvoline syn I use now.
Not loose, it's just that the SAE oils have a range of allowed viscosity with upper and lower bounds.
so, it seems manufactures use of the SAE ratings are pretty loose, with the KV100 viscosity being the most important and the KV40 not really mattering much. For example, (lucas not being well regarded in the first place) Lucas 50w syn actually has a lower viscosity at both KV40, and KV100 than the 20w50 Valvoline syn I use now.
Not loose, it's just that the SAE oils have a range of allowed viscosity with upper and lower bounds.
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