My goal isn't to be one of those forum guys, but here I am anyway. This isn't really that big of a deal, exactly, except it's a mystery and one that I can't figure out. Maybe there's a missing piece of information, maybe I'm missing something besides a good portion of my cerebellum, but here's the rundown for this "mystery."
I bought some Fleetguard LF17531 oil filters because I wanted to try them and they cross-referenced to my application. After the fact, I decided to request some filter data directly from the manufacturer because it's not easily found online. I received a PDF spec sheet showing this:
Anti Drain Back Valve Yes
Valve Opening Pressure 144.8 kPa
Element Collapse/Burst Minimum 0ISO 4548-3
Hydrostatic Burst Minimum 0ISO 4548-6
Capacity 11.8 ISO 4548-12
Rated Flow 11.4 L/min ISO 4548-12
Efficiency 30.8 @ 21.0 micron (c)
The main point of interest is the stated efficiency rating. If it's a percentage, it's awful. If it's a βₓ then it's pretty normal, like ~94-95% at 20μ. Since I was confused by this, I contacted the manufacturer directly and this is the response I received:
"I confirmed the information is 21 microns @ 30.8%. The filter was crossed from a Wix filter, and meets the specifications of that filter."
On one hand, they provide a percentage, which objectively, is pretty awful. On the other hand, they reference crossing with the Wix application (57502). There's even a thread here that asks, and answers, the stated percentage efficiency for the Wix 57502 filter. That percentage/micron rating corroborates my theory that this is a βₓ rating. I'm man enough to admit when I'm confused with this conflicting information. If you folks can shed some light on this, I'd be grateful. Because I'm really on the threshold of either using these filters or just putting something else in when I change my oil.
I bought some Fleetguard LF17531 oil filters because I wanted to try them and they cross-referenced to my application. After the fact, I decided to request some filter data directly from the manufacturer because it's not easily found online. I received a PDF spec sheet showing this:
Anti Drain Back Valve Yes
Valve Opening Pressure 144.8 kPa
Element Collapse/Burst Minimum 0ISO 4548-3
Hydrostatic Burst Minimum 0ISO 4548-6
Capacity 11.8 ISO 4548-12
Rated Flow 11.4 L/min ISO 4548-12
Efficiency 30.8 @ 21.0 micron (c)
The main point of interest is the stated efficiency rating. If it's a percentage, it's awful. If it's a βₓ then it's pretty normal, like ~94-95% at 20μ. Since I was confused by this, I contacted the manufacturer directly and this is the response I received:
"I confirmed the information is 21 microns @ 30.8%. The filter was crossed from a Wix filter, and meets the specifications of that filter."
On one hand, they provide a percentage, which objectively, is pretty awful. On the other hand, they reference crossing with the Wix application (57502). There's even a thread here that asks, and answers, the stated percentage efficiency for the Wix 57502 filter. That percentage/micron rating corroborates my theory that this is a βₓ rating. I'm man enough to admit when I'm confused with this conflicting information. If you folks can shed some light on this, I'd be grateful. Because I'm really on the threshold of either using these filters or just putting something else in when I change my oil.