After seeing Ascent Filtration's study of oil filters (https://bobistheoilguy.com/forums/t...essure-vs-flow-bubble-point-and-burst.334882/) I thought I'd see if there was a visible difference between the Fram Ultra and the OEM oil filter for my Audi A4. The OEM version is a rebranded Mann HU 6013 Z and the Fram Ultra is sold by Advance Auto Parts as the Fram Titanium. Here's a picture of the two side by side:
Both filters have synthetic media and are designed to be used with synthetic oil. The pleats in the Fram filter are backed with a metal screen. Mann says nothing about how their pleats are backed.
The biggest difference I see between the two is that the Fram filter has many more pleats than the Mann filter. From Ascent's study, we can presume that the Fram is 99%+ efficient at 15 microns. Mann provides no information as to the efficiency of their filter.
I currently have a Mann filter in my Audi and am about 1500 miles from the next OC. I'll pull a sample for UOA when I change the oil and use the Fram filter for the next OCI, after which I'll also run a UOA on that oil.
Both filters have synthetic media and are designed to be used with synthetic oil. The pleats in the Fram filter are backed with a metal screen. Mann says nothing about how their pleats are backed.
The biggest difference I see between the two is that the Fram filter has many more pleats than the Mann filter. From Ascent's study, we can presume that the Fram is 99%+ efficient at 15 microns. Mann provides no information as to the efficiency of their filter.
I currently have a Mann filter in my Audi and am about 1500 miles from the next OC. I'll pull a sample for UOA when I change the oil and use the Fram filter for the next OCI, after which I'll also run a UOA on that oil.