Perhaps you could suggest to him to do a video concerning that data. I know I would be interested in what he has to say.
LSjr Video "Facts About Oil Changes"
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Yes! I would take Donaldson data very seriously like I do with Ascent ISO testing. I would love to see the reasoning for completely opposite results.
Preface by saying, like much of the info LS Jr puts out, but I believe he's off base here on oil filters becoming more efficient with use. M&H conducted a study on oil filter efficiency which is the source of the oft posted filter efficiency graph diagrams (post #16 this thread).
In the study summary blurb from it says "In this work, we report on multi pass test results for an oil filter media exhibiting a non-intuitive filtration behavior. After an initial rise, the fractional filtration efficiencies decrease again, until the filter material is clogged."
From "J. Becker*, A. Wiegmann, Math2Market GmbH; F. Hahn, M. Lehmann, Mann+Hummel GmbH, Germany. On FILTECH site.
That said, I don't believe LS Jr leaving the filter in place through multiple OCI's will hurt anything, but unlikely to be a significant or any efficiency gain that he believes.
All that said and otoh, Air Filters do become more efficient with use and why using a Filter Minder vacuum gauge can maximize air filter interval and efficiency.
In the study summary blurb from it says "In this work, we report on multi pass test results for an oil filter media exhibiting a non-intuitive filtration behavior. After an initial rise, the fractional filtration efficiencies decrease again, until the filter material is clogged."
From "J. Becker*, A. Wiegmann, Math2Market GmbH; F. Hahn, M. Lehmann, Mann+Hummel GmbH, Germany. On FILTECH site.
That said, I don't believe LS Jr leaving the filter in place through multiple OCI's will hurt anything, but unlikely to be a significant or any efficiency gain that he believes.
All that said and otoh, Air Filters do become more efficient with use and why using a Filter Minder vacuum gauge can maximize air filter interval and efficiency.
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Lake speed is Ai click bait we all been duped
Before that efficiency loss vs loading curve from Purolator/M+H ever came up on BITOG, I had email traffic with a Purolator engineer and he mentioned the "hockey stick" shaped efficiency curve when I asked about filter efficiency change with time. When first introduced the fact that oil filters lost efficiency with use, people wouldn't believe it because as Purolator said: "…test results for an oil filter media exhibiting a non-intuitive filtration behavior."
Misconceptions can only be broken by science and test results.
On a side note, there's a thread in this forum with test data about filters shedding debris every time there's a sudden increase in flow and dP pulsating. Think there's also an ISO test for hydraulic filters addressing efficiency impact due to flow pulsations. This is another reason to use higher efficiency oil filters, because in actual use on an engine there is ever changing oil flow and dP levels going on across the media. Example - smashing the throttle from idle to near redline is going to make an inefficient oil filter shed more debris than a more efficient filter.
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I posted on the video, asking Lake about his claim that oil filters become more efficient, and that it is directly opposed to other test results. I also asked him about his practice of pouring a quart of oil in, to flush out debris. He replied "Stay tuned for the next two videos".
Naturally
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so he is like Ai you never exactly get a real logical straight answer.
Send him the link to the big Ascent ISO testing thread. See if he can explain why every filter in that test lost efficiency as they loaded up.
More like a salesman, wetting your appetite so you will come back for more.
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More like a pitchman.
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We can beat the filter thing to death - but with those very short runs - doubt it’s skewing any used oil analysis numbers - which is what he presents next …
FWIW I generally dump about a 1/2 quart of fresh oil in my stuff to drive out the oil from the bottom while draining. I get a breif surge of dark used oil then followed by clean coming out of the pan (as expected). Does it make a difference in the long run? Probably not, but it makes me feel better about it so thats all that matters 
4wd
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If you consider this is from doing that cold - with only one quart in an eight quart system - no wonder the dipstick is pristine post change …FWIW I generally dump about a 1/2 quart of fresh oil in my stuff to drive out the oil from the bottom while draining. I get a breif surge of dark used oil then followed by clean coming out of the pan (as expected). Does it make a difference in the long run? Probably not, but it makes me feel better about it so thats all that matters
In the Purolator/M+H graph shown in post 16, the efficiency goes back up as the filter "cakes" to the point where it essentially becomes totally clogged. That's the only time oil filter's get more efficiency with loading. And that's not a point where you want to let the filter get to, as it can make the bypass valve open way too easily and often. If oil filters got more efficient with loading, we would have seen it happen in the ISO 4548-12 tests that Ascent conducted. All 5 of the filters he tested all lost efficiency as they loaded up with debris. The test stopped when the dP was 8 PSI above the new fresh filter dP, so they were far from total caking. So an article like that one is misleading, making it sound like oil filters will become more efficient with use, but that's no actually the case.
Yes, I know that. My thoughts were far from "full cake". But I think you are looking at it as far as end game. Donaldson and Lake's comment are looking at it mid life where the larger pores are blocked by larger debris, hence not changing out Lake's oil filter because it is HAS caught larger and smaller debris because it has some load. Donaldson saying not to change out air filters too early as your filter is "filtering better" mid life. Just like on an old style Fram Ultra with the thicker full synthetic media I would sometimes go TWO 3,000miles runs on the filter and because the filter has 3D filtering with deeper embed the filter becomes more efficient mid life. Also I don't like cotton oil or dry air filters. So I install new thick 3D media OEM style filters every spring to get the maximum flow I can get while not using cotton filters. I throw away a perfectly ok filter every year. By the end of the year I bet I am stopping more debris then the first month I installed it. The media choice, thicker 3D media vs thin paper filter media. embed will eventually start caking where a cheap thin paper filter will start the caking process quicker. As we all know, for the most part. Also I have a cheap fiber blue pre filter in both mine and my daughters furnace and get and want the almost full thin caking of the pre filter to allow longer use of the MERV 13, 4 inch thick main filter. I double+ the time these filters last with this process.
I'll use the "flush" method when I switch oils, but I no longer move fast enough to dump in a quart from above and get my butt under the car to see what it looks like coming out. I have a camera which I'll focus on the oil drain and shoot a short video, assuming I don't forget. If I actually see the darker oil coming out, then start getting the new oil, I'll post it to YT.FWIW I generally dump about a 1/2 quart of fresh oil in my stuff to drive out the oil from the bottom while draining. I get a breif surge of dark used oil then followed by clean coming out of the pan (as expected). Does it make a difference in the long run? Probably not, but it makes me feel better about it so thats all that matters
I got a new borescope and also plan on looking inside the pan before and after this "flush". At this rate, the next OC may take several hours. Sounds like a great weekend piddling session to me. Just changed the oil and filter, but making a couple of longer trips, so maybe within the next few months.
I'm looking at the oil filter efficiency change from new to fully loaded, like seen in the Ascent ISO efficiency thread. Have you seen and read that thread? It shows that all the filters he tested lost efficiency as they loaded up. Similar to the graph on post 16. They lost efficiency at "mid life", and even lost more efficiency by the end of the test, defined by a dP of 8 PSI above the new debris free filter dP. None of them got more efficient over the debris loading period that caused 8 PSI above a clean filter.
Air filters and oil filters behave differently as they load up. This was mentioned earlier by a few other members, and the reason was given. Wonder if LSJr is also thinking oil filters behave like air filters as they load up? They don't behave the same. Ascent's ISO efficiency testing shows how oil filters behave with debris loading. Purolator/M+H says the same.
The OG Ultra tested by Ascent also lost efficiency as it loaded up with debris. Go read that thread. It didn't lose as much efficiency as the less efficient filters. As mentioned before, oil filters that rate high efficiency in the ISO 4548-12 efficiency don't shed debris as bad as lower efficiency oil filters. The Boss and Wix XP in the Ascent ISO test lost efficiency like crazy as they loaded up. That's one reason their ISO efficiency is so bad.
Air filters work on "cake" theory. The dP across an air filter is in inches of water. The dP across oil filters is around 5 to 15+ PSI. Oil filters don't start getting more efficient until they are almost totally choked down like the graph in post 16 shows. But it's a bad idea to run a filter to that level of debris loading unless you want lots of possible bypassing.
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Yeah, doing that falls in a "similar" realm to those that prefill their filters with an oil change. Likely doesn't make a significant difference, but one does it because they can and it makes them feel better about the start up rattle time with the oil change.FWIW I generally dump about a 1/2 quart of fresh oil in my stuff to drive out the oil from the bottom while draining. I get a breif surge of dark used oil then followed by clean coming out of the pan (as expected). Does it make a difference in the long run? Probably not, but it makes me feel better about it so thats all that matters
LSJ did the same oil flush with his daughter's then new Corolla so no surprise on the Tacoma. Unlike filter prefilling, not something I would do but to each their own.
As regards the M&H study on oil filter efficiency, the study itself dates to 2013, and has been discussed several times. Linked are couple of them. In the first, link is no longer active, but similar now found on Filtech site.
https://bobistheoilguy.com/forums/threads/fram-xg7317-after-25000-km.313560/page-2#post-5184054
The second dates to 2017 and was posted on the air filter board, which initially led to some confusion for me. But, that got clarified. It also gives more complete explanation of the study.
https://bobistheoilguy.com/forums/t...-oil-change-we-are.268991/page-2#post-4383380
