Think Highline Warren was doing Prime Guard branded filters well before they took on supplying filters for Mobil.
Which filter do you like better?
- Thread starter Bailey28
- Start date
Highline Warren has a lot of their filters made in Asia (not just China) ... including the new version of the Mobil 1 filter. Prime Guard seems to be Highline Warrens in-house brand name.
https://www.highlinewarren.com/owned-and-licensed-brands
https://www.shophighlinewarren.com/category/detail/0ZGPg0000000AKaOAM
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I will be the outlier and pic the one on the left. This is mainly for the thicker resin center ring. I have used Chinese filters like the one on the right with the thinner resin center ring with 5K oci on Toyotas I have owned and the filters came apart with the resin having cracked and pulled apart.
Perhaps that's true. However, it doesn't alter the fact that most (non-synthetic) Prime Guard oil filters are only rated at 30 microns @ 95% efficiency. They're cheap to buy because they're cheap junk.
Doesn't matter where an oil filter is made, it can still be low efficiency and "junk" in some people's eyes. Prime Guard also has a full synthetic oil filter line, which is shown to be 99% @ 30u, rated for up to 10K miles and has a silicone ADBV.
https://www.shophighlinewarren.com/category/shop/filters/oil-filters/premium/0ZGPg0000000A5JOAU
They may not be the highest efficiency but they're far from "Junk". What issues have you had?
BTW ... they meet the USCAR-36 efficiency spec, so they are probably just as efficient as OEM filters from the Big 3 US automakers who came up with the USCAR-36 spec. If someone wants a more efficient oil filter, there are plenty of them on the market to choose from.
Cold start rattle caused by low efficiency junk filters.
A lower efficiency filter I'd think would be preferable to get fluid flowing sooner since it's used as a hydraulic fluid for chain tensioners. But I get it... you've made up your mind.
Clearly you have no idea. I didn't "make up my mind". I conducted testing by changing various filters and performing cold starts over several days. The result is that using cheap junk filters with lower efficiencies (i.e. larger holes in the media) leads to cold start rattle. In contrast, using higher efficiency filters (i.e. those with smaller holes in the media) moderates cold start rattle.A lower efficiency filter I'd think would be preferable to get fluid flowing sooner since it's used as a hydraulic fluid for chain tensioners. But I get it... you've made up your mind.
The OEM Toyota is made in Taiwan.
I highly doubt it was caused by the size of the "holes" in the media. And if so, the results are opposite what logic says. Is this a cartridge filter or a spin-on?
