LSjr Video "Facts About Oil Changes"

I actually enjoy his comment in general but when I heard his comment about the oil filter I laughed a bit, that's not how that works as we know.

I'll bet he will get roasted in the comments and then go and do some research on his own and later retract that way of thinking.
 
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I actually enjoy his comment in general but when I heard his comment about the oil filter I laughed a bit, that's not how that works as we know.

I'll bet he will get roasted in the comments and then go and do some research on his own and later retract that way of thinking.

I've been texting him. He has data from Donaldson showing oil filters becoming more efficient with loading.
 
You rang........

ac1tl8ajyem51.jpg
 
Zee explains it well here.

View attachment 310395
And we all saw that the oil filters that Ascent tested got less efficient as they loaded up - it's discussed in the big Ascent ISO efficiency testing thread. The better the ISO 4548-12 efficiency, the less they lost efficiency from new to fully loaded at end of test.

It's been an on-going misconception that oil filters "get more efficient " with use. They don’t, the test data shows that and apparently LSJr hasn't seen that test data. He's a test data driven guy, so he needs to dig deeper to find the truth.
 
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As far as running a filter for 2 OCI - I don't see a particular problem with a quality filter. I doubt its better. Some of the bigger openings may get clogged, but it also may end up in bypass longer so its likely a wash at absolute best.
The longer the OCI (or multiple filter runs), the better the filter efficiency you want to use. For instance, running a filter that's IiSO 99% @ 20u and rated for 20K is going to maintain its filtering efficency much better than a filter that's ISO 99% @ 40u and rated for 20K miles. If both those filters were ran for only 3-5K miles then the difference wouldn't matter as much. If you changed oil every 1000 miles or less you might get by with a fine screen like used in old VW bug engines.
 
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In theory, particles having gone into the filter would have been captured by the media.
But there is no guarantee that it stays captured. Filters can release and shed already captured particles, and that's what happens with oil filters as they load up with debris. The higher the ISO efficiency rating, the less of a debris shedder the filter will be. One reason some oil filters have a low ISO 4548-12 efficiency is because they shed a lot of already captured debris as they keep loading up. That was seen in the Ascent ISO efficiency testing.
 
I really don't want to go back and watch the Donaldson video again, but in LSJR's latest video, the short clip he played was the guy saying "air filters". To a point, it may apply to oil filters, but once passed its maximum filtration, it goes into bypass. See video below.


Oil filters lose efficiency way before the dP across the media gets to the level of going into bypass. Again, this was all seen in the Ascent ISO efficiency testing.
 
And we all saw that the oil filters that Ascent tested got less efficient as they loaded up - it's discussed in the big Ascent ISO efficiency testing thread. The better the ISO 4548-12 efficiency, the less they lost efficiency from new to fully loaded at end of test.

It's been an on-going misconception that oil filters "get more efficient " with use. They don’t, the test data shows that and apparently LSJr hasn't seen that test data. He's a test data driven guy, so he needs to dig deeper to find the truth.

Per that testing...

ACDelco Ultraguard Gold

>15 um

5 min - 94.29%
10 min - 91.97%
15 min - 89.13%
20 min - 86.31%
25 min - 84.04%

All 5 filters in that test showed the same with filtration efficiency decreasing with loading.

Oil filter efficiency vs time.webp
 
Per that testing...

ACDelco Ultraguard Gold

>15 um

5 min - 94.29%
10 min - 91.97%
15 min - 89.13%
20 min - 86.31%
25 min - 84.04%

All 5 filters in that test showed the same with filtration efficiency decreasing with loading.

View attachment 310495
Yep, the basic conclusion is that oil filters decrease in efficiency as they load up. And also oil filters with a higher ISO 4548-12 rating will decrease less as they load up. They couldn't rate high in ISO 4548-12 efficiency if they shed a lot of debris.
 
I've been texting him. He has data from Donaldson showing oil filters becoming more efficient with loading.
Interesting...I saw LSJr's video yesterday and I took his statements to mean he learned from Donaldson that AIR filters became more efficient (for a time) as they got a little dirtier so he extrapolated that to oil filters...I didn't get that he actually had data to show it was true for oil filters...

I go with the data and statements from many here that oil filters lose efficiency as they get dirtier...

Bill
 
Enjoying the Pictures inside a pair of same make/model... thread, yesterday I upgraded my very inexpensive borescope to a slightly better, dual-lens, articulating model. The image quality is much better. Next OCI, I'll try to snake the borescope into the oil pan after draining to try to see how much oil remains in the pan. If I decide to make the switch to a different oil at that time, I'll follow LSJR's "flush it with a quart of the new oil" method and repeat the inspection inside the pan.
 
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