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No, shop vacs cant generate the pressure differential needed to open the bypass on most filters.

Such a boring filter! Have you come across even a single defect in any of the Carquest Premiums that you've cut open?

Yea there are a lot of pictures out there. Try searching with the term Filtermag, since those are relatively popular. Here are a couple of the first results I found: https://bobistheoilguy.com/forums/threads/filtermag-on-toyota-90915-10004-filter-pics.92836/ What's missing is an assessment of...

It's their Heavy Duty line, manufactured by Baldwin. I just got off the phone with Baldwin and they corrected my assumptions regarding what they mean by nominal and absolute ratings. It's not 50% and 98.7% like I though, but actually 52% and 98%. They also confirmed that at least the 85516HD...

Someone needs to make a family tree for all of these brands and manufacturers one of these days lol. Could you share the brands you know are manufactured by PGI? Also, I called CQ/AAP and they confirmed the 95.1% @ 20 µm and 99.5% @ 20 µm for the Standard and Premium filters and agreed that the...

One thing I'm curious about is if there is a difference in media based on COO rather than just model line. I think a big part of that is that there's so much less going on with a cartridge, it's mostly just a matter of efficiency. With Fram for example, I stopped using them because of leaky...

The Carquest Premium seem to be one of the best filter choices these days, so I did a pretty in depth look at Carquest's various offerings and though I'd share. Efficiency has been a common question brought up here, and I did my best to organize the contradictory information that is available...

Two things - newly introduced contaminants take longer to be filtered out, and contaminants previously blocked by the filter can become dislodged and then bypass the media entirely, and then need to be filtered again. All together it just means higher levels of particulate contamination in your...

Just throwing some really rough numbers out, but if the inlet holes are eight 0.25" diameter holes, and if there are 200 louvers with a length of 0.25", then the louvers would need to have a width of 0.008" to match the cross section of the inlet holes. But just matching the cross section isn't...

I thought that for efficiency testing they either use ones without a bypass, or they block off the bypass completely.

My vacuuming conspiracy theory being vindicated lol

No flow = no contaminants allowed through = 100% efficient filter. Genius.

Hard to say much with how many changes there have been to the Frams recently. If you don't have concerns about the bypass valves, I'd call them about equal and use them both.

I don't think you are going to have any significant oil starvation issues with any halfway decent modern filter, especially if you are upsizing from stock and changing the oil and filter at reasonable intervals.

One thing you can do on a lot of vehicles with spin on filters that is pretty much always going to be an improvement is to put on a larger filter. This will increase filtration effectiveness, increase flow rate (especially on cold starts), and decrease bypassing. My LX's stock and recommended...

I'm doing some testing with magnets on my spin-on filters. Seems a bit harder to implement with cartridge.

Definitely over 5,000, but I don't think the previous owners had the last oil change in the records they gave me. I'd guess around 10,000.

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Yup, LX 470 and 100-series Land Cruiser are mostly the same vehicle.

Not much interesting info here, but figured I'd share anyway. I tested the oil in this vehicle as I received it since I plan to have it for a long time, and to have a starting point to compare the next UOA to. Oil type is unknown, but based on the dirt cheap Mighty Guard filter, I'm guessing...