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One of the filters is “B1Z22” and the other is “B1409”. I have the others too but I will have to dig them out. The labels also have a date code as well. At least thats what I was told by an employee at a dealership. Filter “B1409” has “KB1E28” on the Honda part # sticker. “B1Z22” had “KB2D19” on its label.
Noted and thank you for the photos!
Last edited by windhund116; Aug 12, 2025 at 04:52 PM.
I think we need to find an aftermarket alternative that has consistent quality and exceeds OEM specs. There's gotta be one out there.
If I understand you correctly, you are unaware that the OEM filter is the only one out there constructed the way it is to prevent it becoming loose and causing a fire. You can find threads on this filter ad nauseam on this site.
The OEM filter, which demands a certain torque/rotation after contact, cannot be tightened by hand and must be done with a tool.
The rubber gasket is between two metal rings that help mate the surface to the engine. Compare it to any other filter that "fits" the S2000 and you will see the difference. Below is the OEM S2000 filter and a Honda standard filter which is for other Hondas (Acura MDX, Accord, etc) . This kind of standard filter may "fit" the S2000 but not recommended by Honda.
You can see the plain gasket which can be hand tightened compared to the ring sandwich of the gasket for the S2000. Don't forget the instruction on the filter species what cannot be done by hand.
Almost everyone here gets some kind of a wrench to loosen and tighten this filter. Mine is below from eBay.
Last edited by cosmomiller; Aug 12, 2025 at 08:29 PM.
And while on topic of these filters, I have to mention the lousy anti-drain back valves. Ive had several that do not seal and drain the oil back to the pan overnight. Ive wasted so many filters because of this its ridiculous. The oil light will stay on for a second longer than it does with a good filter drain back valve. And its of no wonder they dont work sometimes. Ive found them with chunks of silicone stuck to them and given these chucks were in the sealing surface, it would hold the silicone valve back and allow the oil to drain to the pan. Pull the filter off and theres almost zero oil in it after sitting 8+hrs. Then Ill change it and I might get one that will hold the oil overnight.
And while on topic of these filters, I have to mention the lousy anti-drain back valves. Ive had several that do not seal and drain the oil back to the pan overnight. Ive wasted so many filters because of this its ridiculous. The oil light will stay on for a second longer than it does with a good filter drain back valve.
The green Hamp filter is a decent alternative. The Mobil 1 long life filter is decent. I know the German guys like the heavy duty Wix filter.
I like the Purflux LS 350 or MANN W 610/6. US / Euro style square gasket.
Have a look at the Mahle Germany Aftermarket online catalouge. I asked them how the OC 617 Filter compare to the PCX-306 and they told me that they are equal. The OC 617 fits every Honda beside the Legend and NSX.
Waaaaaaaaaaay off topic but what car is that twelve (12) year old tire on -- week 28, 2013?!
-- Chuck
Archived photo from previous, older thread. The replacements for those you see, were Super Sports and those were replaced by 4Ss, and those are about to be replaced themselves this fall.
Last edited by cosmomiller; Aug 13, 2025 at 08:46 AM.
[QUOTE=Mr.Matchbox;25126187]I like the Purflux LS 350 or MANN W 610/6. US / Euro style square gasket.
Have a look at the Mahle Germany Aftermarket online catalouge. I asked them how the OC 617 Filter compare to the PCX-306 and they told me that they are equal. The OC 617 fits every Honda beside the Legend and NSX.
QUOTE]
I did and they look like they have the standard gasket and not the metal ring sandwich the OEM Honda has. Do you use a safety wire then?
