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#4617138 - 12/28/17 08:26 PM Wix VS Wix XP
Ian1982 Offline


Registered: 01/04/16
Posts: 29
Loc: Ct,USA
Have always used the regular Wix oil filters with good success. Is there much difference in filtering capabilities and the amount of dirt the XP will hold opposed to the regular filter. Also, any issues with the XP being restrictive in terms of good oil pressure? Thank You in advance.

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#4617156 - 12/28/17 08:39 PM Re: Wix VS Wix XP [Re: Ian1982]
newtoncd8 Offline


Registered: 01/18/03
Posts: 872
Loc: Colorado
Laboratory Test Performance per ISO 454812 18 grams dirt (WIX 51515), 99% efficient at 23 microns (Based on WIX 51515, WIX 51356, WIX 57060).

Oil Filter Laboratory Test Performance per ISO 454812 32 grams dirt (51515XP), 99% efficient at 35 microns (Based on 51515XP 51356XP, 57060XP)
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#4617164 - 12/28/17 08:44 PM Re: Wix VS Wix XP [Re: Ian1982]
slacktide_bitog Online   content


Registered: 03/20/08
Posts: 6182
Loc: USA
The XP is only worth the extra money if you go way beyond 10k in your OCI smile

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#4617169 - 12/28/17 08:51 PM Re: Wix VS Wix XP [Re: Ian1982]
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 706
Loc: Canada


I've used both, in real-world driving and eye-balling the dipstick, you can't tell the difference.

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#4617190 - 12/28/17 09:06 PM Re: Wix VS Wix XP [Re: slacktide_bitog]
bbhero Online   content


Registered: 03/20/15
Posts: 4634
Loc: Virginia
I agree slacktide. I bet the Wix XP could very easily go 20k miles plus.
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#4617223 - 12/28/17 09:25 PM Re: Wix VS Wix XP [Re: Ian1982]
BrocLuno Offline


Registered: 09/06/15
Posts: 5528
Loc: Kalifornia Kollective
This all depends on how "dirty" your engines is ... And, whether you are running additives to clean stuff up? If not, and your change oil at 6~8,000 miles, there is not much point.

OTOH, if you are running a by-pass filter and doing 30,000 mile oils changes I'd run an XP as the spin on laugh
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#4617233 - 12/28/17 09:36 PM Re: Wix VS Wix XP [Re: newtoncd8]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17795
Loc: PNW
Originally Posted By: newtoncd8
Laboratory Test Performance per ISO 454812 18 grams dirt (WIX 51515), 99% efficient at 23 microns (Based on WIX 51515, WIX 51356, WIX 57060).

Oil Filter Laboratory Test Performance per ISO 454812 32 grams dirt (51515XP), 99% efficient at 35 microns (Based on 51515XP 51356XP, 57060XP)


Enough difference in efficiency for me not to use an XP.

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#4617346 - 12/29/17 12:03 AM Re: Wix VS Wix XP [Re: newtoncd8]
MetalSlug Offline


Registered: 07/24/10
Posts: 2636
Loc: vicksburg ms
Originally Posted By: newtoncd8
Laboratory Test Performance per ISO 454812 18 grams dirt (WIX 51515), 99% efficient at 23 microns (Based on WIX 51515, WIX 51356, WIX 57060).

Oil Filter Laboratory Test Performance per ISO 454812 32 grams dirt (51515XP), 99% efficient at 35 microns (Based on 51515XP 51356XP, 57060XP)


really regular wix ( napa gold ) is more efficient then xp , what the point of coming out xp ?
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#4617357 - 12/29/17 12:32 AM Re: Wix VS Wix XP [Re: MetalSlug]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17795
Loc: PNW
Originally Posted By: MetalSlug
Originally Posted By: newtoncd8
Laboratory Test Performance per ISO 454812 18 grams dirt (WIX 51515), 99% efficient at 23 microns (Based on WIX 51515, WIX 51356, WIX 57060).

Oil Filter Laboratory Test Performance per ISO 454812 32 grams dirt (51515XP), 99% efficient at 35 microns (Based on 51515XP 51356XP, 57060XP)


really regular wix ( napa gold ) is more efficient then xp , what the point of coming out xp ?


WIX touts the XP for much longer OCIs than the regular WIX filter.

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#4617385 - 12/29/17 02:50 AM Re: Wix VS Wix XP [Re: ZeeOSix]
Tony10s Offline


Registered: 05/06/14
Posts: 1129
Loc: Virginia, USA
Originally Posted By: ZeeOSix
Originally Posted By: newtoncd8
Laboratory Test Performance per ISO 454812 18 grams dirt (WIX 51515), 99% efficient at 23 microns (Based on WIX 51515, WIX 51356, WIX 57060).

Oil Filter Laboratory Test Performance per ISO 454812 32 grams dirt (51515XP), 99% efficient at 35 microns (Based on 51515XP 51356XP, 57060XP)

Enough difference in efficiency for me not to use an XP.

Same here, ZeeOSix.

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#4617397 - 12/29/17 04:52 AM Re: Wix VS Wix XP [Re: Ian1982]
dlundblad Offline


Registered: 09/30/13
Posts: 10058
Loc: Indiana
Many people, myself included, religiously use Toyota filters with their 50% filtering efficiency. Nothing to worry about IMO.

My biggest issue is the normal price compared to say a TG or an Ultra. People buy an Ultra and run it for less than 10k too though.
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#4617431 - 12/29/17 06:49 AM Re: Wix VS Wix XP [Re: ZeeOSix]
Triple_Se7en Offline


Registered: 12/04/04
Posts: 8783
Loc: 1/2 hr. north of Detroit
Originally Posted By: ZeeOSix
Originally Posted By: newtoncd8
Laboratory Test Performance per ISO 454812 18 grams dirt (WIX 51515), 99% efficient at 23 microns (Based on WIX 51515, WIX 51356, WIX 57060).

Oil Filter Laboratory Test Performance per ISO 454812 32 grams dirt (51515XP), 99% efficient at 35 microns (Based on 51515XP 51356XP, 57060XP)


Enough difference in efficiency for me not to use an XP.


I run good filters for two 6K OCIs. So could everyone with similar lengths.

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#4617501 - 12/29/17 08:24 AM Re: Wix VS Wix XP [Re: dlundblad]
goodtimes Offline


Registered: 12/08/10
Posts: 2863
Loc: california
Originally Posted By: dlundblad
Many people, myself included, religiously use Toyota filters with their 50% filtering efficiency. Nothing to worry about IMO.

My biggest issue is the normal price compared to say a TG or an Ultra. People buy an Ultra and run it for less than 10k too though.


There isn't any proof Toyota filters are 51% efficient @ 20 microns in the multi pass, (too fast), test. Someone said it was so over six years ago, and drew a picture. There is documented proof from an independent party on their letterhead a Toyota copy filter was superior in particle filtration to a Fram Ultra. In a real world test, on a car that puts particles into the oil. People believe the no proof Toyota claim and it becomes a rumor, then becomes a reference.
My unpopular theory is cellulose, wood cells, filters finer over time than any all synthetic full flow filter. Filters combining wood cells and synthetic fibers is the best combo, in my unpopular opinion. fence smile

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#4617506 - 12/29/17 08:33 AM Re: Wix VS Wix XP [Re: BrocLuno]
4WD Online   confused


Registered: 09/21/10
Posts: 6428
Loc: Texas
Originally Posted By: BrocLuno
This all depends on how "dirty" your engines is ... And, whether you are running additives to clean stuff up? If not, and your change oil at 6~8,000 miles, there is not much point.

OTOH, if you are running a by-pass filter and doing 30,000 mile oils changes I'd run an XP as the spin on laugh


And to add to this logic we recently concluded it was 99/35+50/20
As a primary FU user I find the XP construction to look superior bypass and all
(cut open all filters posting here or not)

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#4617507 - 12/29/17 08:34 AM Re: Wix VS Wix XP [Re: Ian1982]
goodtimes Offline


Registered: 12/08/10
Posts: 2863
Loc: california
Originally Posted By: Ian1982
Have always used the regular Wix oil filters with good success. Is there much difference in filtering capabilities and the amount of dirt the XP will hold opposed to the regular filter. Also, any issues with the XP being restrictive in terms of good oil pressure? Thank You in advance.


Good success shouldn't be messed with in my opinion. The oil pressure should be the same. If you know your filters are fully choked at your fixed interval, then an XP would be better. Or you have a race car with an enormous oil pump.

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