Wix VS Wix XP

[MLA]

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)

I find this data confusing: The regular WIX 51515 filter, 99% at 23 um should capture much more material by weight & many more particles by particle counting as it capturing 99% of all the particles larger than 23 um vs 99% of only the particles larger than 35 um. I understand that the particles larger than 35 um will be much heavier than the particles sizes between 23 um and 35 um.

Could someone explain the variation of the ISO 454812 Test Data and the Data from the the WIX site expressing the Beta Ratio:2/20=6/20?

The WIX.com data sheet for a regular 51515 Oil Filter is expressed as Beta Ratio: 2/20=6/20. This is 50% Efficient at 6 um and respectively 95% at 20 um. WIX does not provide an Oil Filter Efficiency for the 51515XP, seems odd given this filter is much more expensive and they are not providing the Beta Ratio Data Sheet.

 

[Glenda W.]

WIX does not provide an Oil Filter Efficiency for the 51515XP, seems odd given this filter is much more expensive and they are not providing the Beta Ratio Data Sheet.

The efficiency is really bad so they stopped providing the info. Advertised as a high flow long interval filter is what you get now.

 

[ZeeOSix]

I find this data confusing: The regular WIX 51515 filter, 99% at 23 um should capture much more material by weight & many more particles by particle counting as it capturing 99% of all the particles larger than 23 um vs 99% of only the particles larger than 35 um. I understand that the particles larger than 35 um will be much heavier than the particles sizes between 23 um and 35 um.

Could someone explain the variation of the ISO 454812 Test Data and the Data from the the WIX site expressing the Beta Ratio:2/20=6/20?

Post 2 was from 2017, and looks like the filter description verbiage from a website like O'Reilly or Autozone.

The holding capacity in grams is simply the amount of debris of all sized particles it can hold before getting close to the dP that would cause the filter to go into bypass. Can't really correlate it well to the efficiency because depending on how the media is designed, and how much material there is in the filter, the efficiency can be high with low or high holding capacity. The more media area, the higher the holding capacity will be with other factors being constant.

The WIX.com data sheet for a regular 51515 Oil Filter is expressed as Beta Ratio: 2/20=6/20. This is 50% Efficient at 6 um and respectively 95% at 20 um. WIX does not provide an Oil Filter Efficiency for the 51515XP, seems odd given this filter is much more expensive and they are not providing the Beta Ratio Data Sheet.

Yeah, just because a filter seems to be the "top tier" filter and is more expensive doesn't mean it's the best performing filter. At on time Wix told people on the phone when they called Wix Tech Support that the efficiency on the XP was "proprietary". So good that it's a top secret.