Originally Posted By: DuckRyder
Interesting, going to have to digest this a bit.
I believe this oil will do what Mobil says it will, while I’m going to be a little off reservation on the time, I’ve got enough confidence to give it the old college try. In order for the oil to demonstrate that it can go the distance (outside of Mobils data) someone has to try it. I still believe there has to be something going on with this oil that isn’t readily apparent in a consumer level UOA. Also without the TAN I bet no one would be saying change it...
You're likely right there but keep in mind, like I recently learned, just because the TBN is still showing good or high doesn't necessarily mean the oil is still good.
Like I learned, some TBN is better than others so just because the number is still high, it doesn't necessarily mean it is doing its job.
Basically, it boils down to the fact, that without the TAN number, the TBN number is basically useless.
Your UOA, which shows the TAN and TBN shows the TAN number above the TBN, which, imo, case in point, shows the TBN isn't necessarily doing a great job removing acids as it still shows a rather high number.
I'd think twice about extending/using this oil for anymore mileage than what you already have. Like others and myself have said, it is spent and should be changed out.
EDIT: the info/thread, which is a very good read.
"Originally Posted By: SonofJoe
Regarding TBN 'retention'...
There's a story that's frequently peddled around the industry, that expensive, over based metallic Salicylate detergents are better on TBN retention than commoner and cheaper over based Sulphonates & Phenates.
This may or may not be true but even if it is, I would dispute the fact that 'TBN retention' is a good thing. The primary purpose of this class of additive is to neutralise acids that build up in the oil and keep that neutralised 'stuff' suspended in the oil. If you have two oils of equal starting TBN and after x miles, under identical conditions, one oil has a lower TBN than the other, then in my book, it has done a BETTER job at zapping acidic species than the other oil.
Think about it! Compare a busy man with an idle, blobby couch-potato. The latter might point to how superior he is in terms of 'shoe leather retention' but it's not the most meaningful of boasts is it?
Thread with info within from Sonofjoe.
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4699813/1
Interesting, going to have to digest this a bit.
I believe this oil will do what Mobil says it will, while I’m going to be a little off reservation on the time, I’ve got enough confidence to give it the old college try. In order for the oil to demonstrate that it can go the distance (outside of Mobils data) someone has to try it. I still believe there has to be something going on with this oil that isn’t readily apparent in a consumer level UOA. Also without the TAN I bet no one would be saying change it...
You're likely right there but keep in mind, like I recently learned, just because the TBN is still showing good or high doesn't necessarily mean the oil is still good.
Like I learned, some TBN is better than others so just because the number is still high, it doesn't necessarily mean it is doing its job.
Basically, it boils down to the fact, that without the TAN number, the TBN number is basically useless.
Your UOA, which shows the TAN and TBN shows the TAN number above the TBN, which, imo, case in point, shows the TBN isn't necessarily doing a great job removing acids as it still shows a rather high number.
I'd think twice about extending/using this oil for anymore mileage than what you already have. Like others and myself have said, it is spent and should be changed out.
EDIT: the info/thread, which is a very good read.
"Originally Posted By: SonofJoe
Regarding TBN 'retention'...
There's a story that's frequently peddled around the industry, that expensive, over based metallic Salicylate detergents are better on TBN retention than commoner and cheaper over based Sulphonates & Phenates.
This may or may not be true but even if it is, I would dispute the fact that 'TBN retention' is a good thing. The primary purpose of this class of additive is to neutralise acids that build up in the oil and keep that neutralised 'stuff' suspended in the oil. If you have two oils of equal starting TBN and after x miles, under identical conditions, one oil has a lower TBN than the other, then in my book, it has done a BETTER job at zapping acidic species than the other oil.
Think about it! Compare a busy man with an idle, blobby couch-potato. The latter might point to how superior he is in terms of 'shoe leather retention' but it's not the most meaningful of boasts is it?
Thread with info within from Sonofjoe.
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4699813/1
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