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Yea it's hard to say much about the bypass leak testing without knowing more about the construction. When I get around to cutting some of these open I think I'll have a better idea of how I can do it better. I don't think the Carquest was leaking through the bypass, probably just passing through...

2UZ-FE in a 2004 LX 470. From what I can find, the 1UZ-FE doesn't have internal bypass. I don't know about the 2UZ-FE though.

Yea the used state of it isn't a concern. Who knows how long it was in there.

Maybe I shouldn't be so hard on it... but small cellulose filter with no bypass, just seems unnecessarily cheap and unlikely to be worth the few dollars saved. There is another post of it by someone else here: https://bobistheoilguy.com/forums/threads/mighty-engine-guard-m3614-cut-open.336018/...

Added oil to the filter, then slightly pressurized. The leak is inside the seal though, so would just be a potential drain back issue. And I should mention that, while I think zero leaking from the ADBV and face plate junction should be the standard, only the first XG3600 (and maybe the ones I...

The best way to test an oil filter is in the range of expected operating conditions. These tests were specifically meant to be non-destructive to look into their usefulness for assessing a filter (to some degree) without making it unusable. Regarding just the matter of applying a vacuum to the...

Absolutely terrible. Don't have much info on its usage. First oil/filter change by me on this vehicle. On the bright side though, the uh... anti-bypass valve doesn't have ripples!

I tested three FS3600, three FE3600, four XG3600, and because of the disappointing results, added a Carquest Premium 85516. I went into this testing expecting Fram to perform very well, fully planning to use them in my vehicles. Based on the results of these tests and Fram's failure to respond...

I contacted Fram a couple times, but no response yet. Been about 2 weeks, so not expecting much.

I think it's unlikely to happen, but there absolutely is a chance. Regardless of likelihood, the potential shouldn't exist at all. Sad to see what's happened to a once great filter.

I could definitely add some if you have a link, but I didn't see any NLGI 1 options from those three. I did add a Royal Purple grease and also a column for copper corrosion test results.

Just put together a bit of info and thought I'd share. It's a rough draft, but I don't know if/when I'll get to adding more, so throwing it out in its current state. There are obviously many more brands, and I know the Mystik list is incomplete, but their website is currently broken...

That bypass is looking nice these days...

You are definitely correct about leaking with air not implying leaking with oil, but that's why I brought up the rate the air was leaking. Probably can't judge it from the video, but it's pretty substantial. Hopefully will have time to do the oil test tonight to be sure though. Purpose is just...

Decent reference point still, thanks for that. I was planning on using 10 ml or so for the bypass leak tests, then using what gets through for ADBV testing. I'll see about upping the amount a bit, but need to be careful about just saturating the media with it. I'll probably use the filter with...

Some of yall are crazy with the strawmen lol. I don't know if anybody has made the claim that ADBVs need to function perfectly down to the drop in order to be effective or worthy of their exalted prefix. Ideally they would, of course, but in the event that they don't, my humble opinion is that...

If you read my reply to that same comment, you should see how the ADBV can affect bypassing. I prioritize filtration efficiency over ADBV functionality, but, as demonstrated, there can be a significant difference in ADBV functionality between two filters of the same model.

So we agree that ADBVs can impact startup bypassing and that a well functioning ADBV is better than a poorly functioning one :)

The specifics will vary vehicle to vehicle, but drained oil can cause a filter that doesn't bypass on startup to begin to do so, and it WILL cause a filter that does bypass on startup to do so more. Bypassing happens when the pressure differential across the bypass valve exceeds the bypass...