I doubt seriously what Fram says now....
Why ??
For starters...
Jay said og Fram ultra media was 80 percent efficient at 5 microns....
Last I checked.... That's better than 74 percent at 10 microns.
What Andrew tested aka og Fram ultra media was actually Better than what Fram claimed... .
They are full of it. Now they are.
And no...
I don't believe Jay was lying or making up his numbers. .
Andrew's testing proved that to be true.
99.8 percent at 15 microns per Andrew's test results... What's that extrapolated doesn't to 10 microns ? ?
Yeah... I'd bet the house it's well more than 74 percent.
The XG10060 is smaller than the XG10575 that Andrew tested per ISO 4548-12 (see links below). That could have a factor on what we saw on the XG10575 test and why it did better than Fram claims. Remeber that Fram's efficiency is also based on 3 different filter models (probably the average of those 3 filters). The present (now old) Fram XG vs new XG is based on the same filter (XG10060) - Fram data below.
Not sure if Motorking mentioned which XG model the 80% @ 5u was based on. I could see the XG10575 might drop off rather quickly like the other filters (AC-Delco and WIX) in Andrew's test at some point near 15u, and then the old Ultra XG10575 tested by Andrew might have dropped to say 95% at 10u and 80% @ 5u.
To add, 99% @ 15u (old XG10575) vs 91% @ 15u (new XG10060) could very well be from the filter size difference which would impact the delta-p as it loads up, and therefore the sloughing off of captured particles which could very well make the smaller filter less efficient compared to the new under fully loaded conditions, which is what the overall ISO 4548-12 test efficiency is based on.
When you start comparing different size/model filters, then a difference of 10% or less in the lower particle sizes can be caused by the size difference. Like I've said many times, the only way to know what's going on with the new XG would be if a new XG10575 was tested by Andrew with the exact same test parameters.
Side note - notice that all the boxes shown on the Fram website are the new boxes that don't have the wire backed media blurb on the box like they use to. That line now says "Perfect Seal Gasket".
FRAM ULTRA® Spin-on Oil Filter XG10060
www.fram.com
FRAM ULTRA® Spin-on Oil Filter XG10575
www.fram.com