Got this response from Mobil 1 tech:
The Mobil 1 M1-108A oil filter has a by-pass valve setting of 11-17 psi. The micron rating for the filter media is 30 micron at 99 plus % efficient.
An oil filter filtering media rated at 30 micron is pretty bad. In summary for people easier to understand the difference on oil filter efficiency, here's a
quote from GM engineer David Staley taken from a 1988 SAE paper on oil filter efficiency:
Compared to a 40 micron filter, engine wear was reduced by 50 percent with 30 micron filtration. Likewise, wear was reduced by 70 percent with 15 micron filtration.. In other words, in general the smaller the micron number, the better the filtering efficiency provided they have similar flow rates.
Now here are product specifications on Wix 57002 which is custom made for Mazda SkyActiv-G engines which should have similar specs as Mazda "high-flow" OEM oil filters such as PE01-14-302A:
Part Number: 57002
UPC Number: 765809570023
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Enhanced Cellulose
Height: 2.827 (72)*
Outer Diameter Top: 2.685 (68)*
Outer Diameter Bottom: Closed:
Thread Size: 20X1.5 MM
By-Pass Valve Setting-PSI: 11-14
Nominal Micron Rating: 15
( )* denotes metric
And here are product specifications on Wix 51365 which is equivalent to Mazda conventional OEM oil filter B6Y1-14-302A:
Part Number: 51365
UPC Number: 765809513655
Style: Spin-On Lube Filter
Service: Lube/Transmission
Type: Full Flow
Media: Enhanced Cellulose
Height: 2.58 (66)*
Outer Diameter Top: 2.69 (68)*
Outer Diameter Bottom: Closed:
Thread Size: 20X1.5 MM
By-Pass Valve Setting-PSI: 8-11
Anti-Drain Back Valve: Yes
Beta Ratio: 2/20=6/20
Burst Pressure-PSI: 300
Max Flow Rate: 9-11 GPM
Nominal Micron Rating: 21
( )* denotes metric
We can see how different these 2 oil filters are on specs although both can "fit" onto several different engines. Both Mobil 1 M1-108A and Bosch ST3300 claim they are compatible with Mazda's "high-flow" PE01-14-302A and conventional B6Y1-14-302A oil filters. Really?
Now let's compare other oil filters. I'll use the data provided by RepeatMazda from the other thread. As we can see SkyActiv oil filters have the best filter efficiency at 15 microns AND high flow rates (claimed by Mazda but no date; estimated larger than 9~11 GPM rated on conventional filter) which beat all other oil filters listed.
⋯ I've cross-referenced several filters below. ⋯ I'll put the Wix "custom" filter and the Wix equivalent to the B6Y1-14-302A at the top for direct comparison.
Wix 57002 - PSI 11-14 - Nominal Micron Rating of 15
Wix 51365 - PSI 8-11 - Nominal Micron Rating of 21
Purolator L14612 - PSI 14-18 - 96.5% @ 20 microns
Fram XG6607 - PSI 13 - 99% >20 microns
Bosch ST3300 - PSI 8 - Micron Rating of 20 (assuming nominal)
MicroGard MGL57002 - PSI 11-14 - 95% @ 29 microns (MicroGard is made by Wix)