Fram Ultra Alternative

[bullwinkle]

Have the Germans lost their way?

Only when they build filters in Fayetteville, NC, or their other non-European factories.

 

[bullwinkle]

No, the Ultra is more efficient.

Still would like to see a face off between the redesigned Ultra & the new 20K Boss. Heck, let’s make it a fatal 4-way and add the Ecore ST20K/K&N Premium and the Ecore Royal Purple. Since the manufacturers all like changing stuff constantly!

 

[ZeeOSix]

I am wondering if it was the 15k OCI Boss filter or the updated to 20k OCI Boss filter in the testing. Saw Purolator's website says better than 99% at 25 microns for the 20k version. Been using ultras but the fixing something that wasn't broken update to the media has me annoyed like others.

No way to know unless @Ascent Filtration Testing still has the Boss box laying around. When did the new 20K Boss hit the shelves?

The Boss efficiency is based on their huge PBL30001 filter - so a smaller filter like what Ascent tested could come in worse. Footnote of efficiency is at the bottom of the Boss webpage.

*Based on ISO 4548-12 at 25 microns on PBL30001

https://www.pureoil.com/en/products/oil-filters/purolator-boss.html

 

[Drewby83]

No way to know unless @Ascent Filtration Testing still has the Boss box laying around. When did the new 20K Boss hit the shelves?

The Boss efficiency is based on their huge PBL30001 filter - so a smaller filter like what Ascent tested could come in worse. Footnote of efficiency is at the bottom of the Boss webpage.

*Based on ISO 4548-12 at 25 microns on PBL30001

https://www.pureoil.com/en/products/oil-filters/purolator-boss.html

Hard to find when the 20k Boss started but the places that sell them online have descriptions as 20k but the product pics still have 15k on the boxes so seems not long ago? Interesting though that the same filter media would perform differently based on size of filter. Oil is passing through the same media. The media should catch the same particle sizes you'd think.

 

[ZeeOSix]

Hard to find when the 20k Boss started but the places that sell them online have descriptions as 20k but the product pics still have 15k on the boxes so seems not long ago? Interesting though that the same filter media would perform differently based on size of filter. Oil is passing through the same media. The media should catch the same particle sizes you'd think.

At a constant oil flow rate (like what's used in the ISO efficiency test), there is less delta-p across a larger oil filter that has more media area. As the media loads up and delta-p increases, it can make already captured debris in the media come loose and go down stream, which hurts the overall ISO efficiency. The ISO efficiency rating is the average of the new starting efficiency and the end of test (near fully loaded) efficiency.

If you read from the linked post below, you will see this phenomena discussed. Filter companies will typically use their largest oil filter in the ISO test so it shows the highest efficiency possible. I think Fram is the only company where I've seen the ISO efficiency based on 3 different sized filters.

https://bobistheoilguy.com/forums/t...ow-bubble-point-and-burst.334882/post-5789233

 

[kschachn]

Yeah, at 99+% ... not at "nominal" 50%.

Always such confusion about this topic. Of course there’s a reason for that.