New oil removes old oil anti-wear film?

[Jeep Junkie]

What are these people talking about? How can fresh oil cause more wear? They claim oil can be changed too often because it removes the film by old oil. Do you guys believe this?
I got this screenshot from BITOG

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[BDinTX]

interesting, I could see that maybe if you're changing oil brands...
can you link the actual thread?

 

[Jeep Junkie]

interesting, I could see that maybe if you're changing oil brands...
can you link the actual thread?

https://bobistheoilguy.com/forums/threads/can-one-change-oil-too-often.230830/

 

[Pismo61]

Well that's from 2015. I would think there would be more on this.

 

[autotragic]

What are these people talking about? How can fresh oil cause more wear? They claim oil can be changed too often because it removes the film by old oil. Do you guys believe this?
I got this screenshot from BITOG

They are specifically talking about changing oil type/brand/etc where the additive package is different. The added detergents/detergent type of the new oil could interfere with the additive package of your previous oil and cause accelerated wear before the new additive package has had a chance to deposit itself.

If you use the same brand/type of oil you can change it as often as you can afford to with no ill effect.

 

[Jeep Junkie]

They are specifically talking about changing oil type/brand/etc where the additive package is different. The added detergents/detergent type of the new oil could interfere with the additive package of your previous oil and cause accelerated wear before the new additive package has had a chance to deposit itself.

If you use the same brand/type of oil you can change it as often as you can afford to with no ill effect.

I see. So sticking to one type of oil is a good idea. PUP 5w30 every 3000 miles

 

[autotragic]

I see. So sticking to one type of oil is a good idea. PUP 5w30 every 3000 miles

You got it sport!

 

[jaymz]

That doesn't make a bit of sense. In order for the new oil to remove the old, it must come in contact first, which means it would leave it's own new film while simultaneously removing the old.

 

[autotragic]

That doesn't make a bit of sense. In order for the new oil to remove the old, it must come in contact first, which means it would leave it's own new film while simultaneously removing the old.

If the additive packages aren't compatible it's a bad thing for your engine. This is exactly why when you change oil types you need to accelerate the first OCI after the switch. Having said that it's more of an issue if you are always using "whatever is cheapest" all the time and not sticking to quality oils.

 

[jaymz]

If the additive packages aren't compatible it's a bad thing for your engine. This is exactly why when you change oil types you need to accelerate the first OCI after the switch. Having said that it's more of an issue if you are always using "whatever is cheapest" all the time and not sticking to quality oils.

I don't believe that for one second. I've been in the auto repair business for 4 decades, 2 of those running a fleet. We buy and use whatever oil is the cheapest at the time and have not had a single oil related engine failure. Ever. I can't help but think that if what you said was true, I'd have seen at least one or two by now.

Or perhaps all additive packages are compatible and what you're stating is purely hypothetical.

 

[autotragic]

I don't believe that for one second. I've been in the auto repair business for 4 decades, 2 of those running a fleet. We buy and use whatever oil is the cheapest at the time and have not had a single oil related engine failure. Ever. I can't help but think that if what you said was true, I'd have seen at least one or two by now.

Or perhaps all additive packages are compatible and what you're stating is purely hypothetical.

Don't shoot the messenger...

Argue with guys like him...

 

[Pape]

Don't shoot the messenger...

Argue with guys like him...

Maybe I did not get it but where in this video he says changing oil brand is making more wear.
I'm familiar with the guy and as per my memory the reason he say to do back to back change when you switch oil brand is to make sure the analysis is for the new oil and not a hybrid of the new and old.

 

[autotragic]

Maybe I did not get it but where in this video he says changing oil brand is making more wear.
I'm familiar with the guy and as per my memory the reason he say to do back to back change when you switch oil brand is to make sure the analysis is for the new oil and not a hybrid of the new and old.

That video is just an example, he's a guy that actually knows a thing or two about oil though and he says not to switch oils all the time.

 

[jaymz]

That video is just an example, he's a guy that actually knows a thing or two about oil though and he says not to switch oils all the time.

Do you have a link to that video?

 

[AcesandEights]

It's kinda true. Modern oil is detergent oil, so it strips sludge and holds debris in the oil, which is then filtered. If you have a very old engine, like very old, that doesn't have modern filtration, new oil may dislodge debris and sludge that cannot be properly filtered.

The info in the original post isn't at all relevant to our engines. If you have a 1964.5 Mustang with an original 289, you may want to use non-detergent oil, if you can find it.

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