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oil filter gen3 and gen4

Discussion in 'Gen 4 Prius Main Forum' started by shiyi, Apr 18, 2024.

  1. shiyi

    shiyi New Member

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    Hi guys,
    it seems there are 2 types of oil filter,
    regular oil filter 90915yzzn1
    just the filter inside 4152yzza6

    for 4152yzza6 seems fit gen3 and some of the gen4
    90915yzzn1 fit some of the gen4.

    what do you use?
     
  2. Mr.Vanvandenburg

    Mr.Vanvandenburg Senior Member

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    I use the N1 type. Researching oil filters I have found maybe the Purolator 4976 or 4977(longer) are good USA options.
    Whip City Wrencher has had some videos on oil filters. He found some have a gap where oil will leak past the filter element. I am not sure it matters, but it is not supposed to do that.
     
  3. Doug McC

    Doug McC Active Member

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    Perhaps I’m misinformed, but don’t all the Gen 4’s use yzzn1? For my ‘22 with frequent oil changes it is just simpler for me to use the Toyota filter and oil. Seems to me if there were better options for the car Toyota wouldn’t go through the hassle of having filters made for them or having oil companies reformulate oils for them.
     
  4. Mendel Leisk

    Mendel Leisk Senior Member

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    All Gen 3's and early year Gen 4's had the permanent housing; it was just a paper cartridge that was replaced. They switched to spin-on sometime in model year 2017 IIRC.

    Quote from OP with mark-up:

    it seems there are 2 types of oil filter,
    regular oil filter 90915yzzn1
    <that's the spin-on style
    just the filter inside 4152yzza6<that's the paper element only, plus replacement O-ring for the permanent housing.

    Gen 3's, and early Gen 4's, can be converted to spin-on style. I've done our Gen 3. There's a link in my signature on it (Spin-On...). A bit further down the page from the link are more pics, of the install. If viewing on a phone, turn it landscape to see signatures.

    My reasoning for doing the conversion, and I think it's fairly common, is to reduce the complexity and possibility of errors. You can absentmindedly forget to put in a replacement filter, with the permanent housing style. Everything will go together just fine, and there's no difference in outward appearance. There also can issues with with the large O-ring that is replaced on the permanent housing barrel: it can be placed at the wrong place on the barrel, or even if correctly placed and lubed with copious oil, it can shift during install.

    There was one case reported here: first time someone did an oil change themselves, after dealership service, they removed the permanent housing and found there was no filter. (they raised hell with the dealership). You can't make this mistake with a spin-on filter.
     
    #4 Mendel Leisk, Apr 20, 2024
    Last edited: Apr 20, 2024
  5. Doug McC

    Doug McC Active Member

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    Thanks for that info, I appreciate it.
     
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  6. Mr.Vanvandenburg

    Mr.Vanvandenburg Senior Member

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    I always feel the company knows best with their teams of qualified engineers. I cut open a number of oil filters, one N1 had a bump of resin glue on the area that seals the bypass. The bump raises the bypass valve so oil will leak through. That was just in one filter.
    That said I also realize from Whip City Wrencher some of the best filter companies have visible pores in the media he shows under a microscope. Mann, Baldwin, Denso, Toyota show light spots. Why is that? I come to the conclusion it doesn’t matter. They know what they make.
    Looking at bypass filters, which can filter oil analytically clean, they bypass only a small amount of oil through the filter, and the rest is completely unfiltered. Yet the oil is clean.
     
    #6 Mr.Vanvandenburg, Apr 20, 2024
    Last edited: Apr 20, 2024
    Doug McC likes this.
  7. shiyi

    shiyi New Member

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    Thank you so much legend. I have seen you around over the years, thank you for reply to my post.
    Your reply confirmed my suspicion.
    2018 seems to be the year of the cutoff, both of the filter said to fit 2018.

    Today I jacked up the car and see the paper element version, buying the adaptor now to work on it.

    I bought the wrong adapter first try. for future reference, buy the 6 bin adaptor, not the 4 pin one.



     
    Doug McC likes this.