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Oil filters

Discussion in 'Stock 2006 -2010 Explorers' started by Digitalgp, April 26, 2019.

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  1. Digitalgp

    Digitalgp Member

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    What is the correct oil filter for the 4.0 sohc? Ive been told both the FL-1A and the FL820s (or aftermarket equivalents) for my ‘07 ex. I’ve had both on my engine and don’t notice any difference. Any opinions?
     
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  3. digifoss

    digifoss Elite Explorer

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    The FL820S fits the 4.0 and the 4.6. My 1984 F150 uses the FL1A.
     
  4. MotorCityFats13

    MotorCityFats13 Well-Known Member

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    I think that was also the filter I used on a 302 I had swapped into a 1983 mustang and my 1985 300 I6 f-150
     
  5. Mbrooks420

    Mbrooks420 High Voltage. Elite Explorer EF Vendor

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    Make sure to use the correct one, as the threads are not the same. One is metric, and the other is SAE.
     
  6. CDW6212R

    CDW6212R Hauls the mail. Elite Explorer

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    Those don't interchange, as said the threads differ.

    The early 4.0 SOHC's took an FL1A filter, the block oil filter adapter used typical old SAE threads. Later in the 2000 range Ford changed the block oil filter adapter, and from then on they should all take the FL820S filter. You can swap the adapter to use the SAE thread, and a common FL1A, or a few other larger filters common to use for gaining fluid capacity.
     
  7. Digitalgp

    Digitalgp Member

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    Maybe I’m wrong about it being the FL1A filter. I know the FL820s is a short and wide filter and that’s the one I thought was correct for my application, But apparently theres another filter that is slightly longer and narrower that threads into the FL820s place. That’s the issue I’m having. Places telling me the FL820s style filter is wrong and they alternatively put this other filter on.

    Oh well, the warmer weather is here and I can go back to doing my own oil changes again.
     
  8. Mbrooks420

    Mbrooks420 High Voltage. Elite Explorer EF Vendor

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    Places telling you it’s wrong are places I’d never spend my money on. They are incorrect, period. Your filter should be the FL820s.
    A98C5E71-F709-4C8C-8B83-92B5D0EE5206.jpeg
    From your 2007 manual.
     
  9. CDW6212R

    CDW6212R Hauls the mail. Elite Explorer

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    Ditto, they did away with the SAE threads and the FL1A years before 2007. I'm not familiar with other filters which may also mount in place. But either stick with the FL820S, or find out what larger filters may fit also, and have the right anti-drain back valve, plus filter rating(15 microns etc).

    Filters very a bunch, so don't use anything not recommended unless you research it well first.
     
  10. ThunderbirdSport

    ThunderbirdSport Active Member

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    820S is the correct filter
     
  11. MNgopher

    MNgopher Active Member

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    The FL820s is the correct filter for your application.

    Older 4.0's did use a FL-1A (at least my '97 Explorer did), but that is a standard thread filter.

    I'm guessing what you are running into is how some places, namely quick lube places, use an FL-500s where an FL-820s is specified. The FL-500s is smaller, but uses the same thread on the oil filter boss. Quick lube places especially do this to minimize the number of filters they need to carry in stock. (I ran into this when I bout my previous truck and wondered what the heck this tiny filter was I was removing...)

    Does the FL500s fit? Does it generally work? It fits, but beyond that... If it were me, I'd stick to the FL820s.
     
  12. CDW6212R

    CDW6212R Hauls the mail. Elite Explorer

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    The FL820S is a small filter. I've wanted to swap a larger one for it for years. But that's not easy to do like the more common FL1A.
     
  13. Digitalgp

    Digitalgp Member

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    That must be it.... the FL500 (or aftermarket equivalent). According to what I've read on Bobistheoilguy it does thread into place of the FL820s, however it has a slightly lower flow rate and lower by-pass rate. Lesson learned
     

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