Difference between oxidation resistance and oxidation stability?

[BigTimeTA]

Is there any difference between oil oxidation stability and oxidation resistance?

To phrase the question in another way, Is there anything different between an oil formulated specifically for high temperature resistance and an oil with oxidation stability in mind for long drain intervals? Or both are one and the same?

 

[fantastic]

Is there any difference between oil oxidation stability and oxidation resistance?

To phrase the question in another way, Is there anything different between an oil formulated specifically for high temperature resistance and an oil with oxidation stability in mind for long drain intervals? Or both are one and the same?

What is oil oxidation?​

Oxidation occurs when the addition of oxygen changes a chemical substance.

Take an apple, for example. Everyone knows that oxygen will quickly cause a cut apple to turn brown.

Or metal. Oxygen can cause rust to form on some metals in a matter of days. Have you ever noticed your brakes grinding after having left your car sit for a couple days in wet weather? That sound is your brake pads scouring rust from the rotors.

https://www.machinerylubrication.com/Read/28966/oil-oxidation-stability
What is meant by the term “oxidation stability” and why is it important?

Oxidation stability is a chemical reaction that occurs with a combination of the lubricating oil and oxygen. The rate of oxidation is accelerated by high temperatures, water, acids and catalysts such as copper. The rate of oxidation increases with time. The service life of a lubricant is also reduced with increases in temperature.

https://www.machinerylubrication.com/Read/1028/oxidation-lubricant
Antibiotics are added to be sacrificial in preventing oxidation for a duration of time. "resistance" is supplying the oil with a better base to better cope with the natural oxidative process. I would venture to say that both phrases are there to do the same end goal & may be more marketing between the two. Oxidative Stability could be said to handle the load good enough & Oxidative resistance could be said to handle the load best by going further into higher quality oil/additives.

 

[kschachn]

There's no difference in the way you've termed it for oxidation. The various ASTM tests such as D6984 and manufacturer in-house tests measure this lubricant property.

But long-drain or long-life oils have other considerations besides oxidation.