[jay2000]

Here is some good info on oil filters and why i use the honda oil filter.
Well, i got my snazzy oil filter cutter, and opened 3 filters in my garage:

1) A Honda 15400-PT7-005 (Fram?)
2) A Honda 15400-PCX-004 (current S2000 filter)
3) A Denso 150-1006 sold on a Honda parts site as "better than the cheap Fram filter Honda is selling".

Let's count pleats:
1) 47
2) 53
3) 47

Advantage: Honda S2000 filter

Let's measure the filter media height:
1) 53mm
2) 53mm
3) 44mm

Advantage: Hondas

What about external flow holes?
1) 6
2) 8
3) 8

Advantage: Honda PCX & Denso (combined with the internal holes, these 2 clearly have higher flow capability)

Symmetry of pleating:
1) Good
2) Fair
3) Excellent

Advantage: Not sure. Are symmetrical pleats better?

Bypass valve material:
1) Treated paper
2) All Metal
3) Plastic

Bypass diameter:
1) Approx 19mm
2) 20mm
3) 10mm

Advantage: Honda S2000 filter

Bypass valve tension (estimated):
1) Moderate
2) Higher
3) Moderate

Advantage: Honda S2000 filter (assuming higher tension means less bypass/higher oil pressure needed for S2000 engine - clearly not an "all-purpose" design

Internal holes (for oil flow)
1) 104
2) 220 (slightly smaller than #1)
3 165

Advantage: Honda S2000 filter - Denso close with smaller filter size

Filter media depth:
1) 12mm
2) 12mm
3) 12mm

Advantage: Both Honda filters had more surface area

End seal anti-drainback gasket material:
1) Silicone rubber
2) Silicone rubber
3) Silicone rubber

Advantage: None - all had fine quality materials.

Oil flange mating gasket:
1) O-ring type with torque limiting design
2) O-ring type with torque limiting design
3) O-ring type with torque limiting design

Advantage: None. All had quality gaskets unlikely to leak if properly torqued using the "7/8's rule".
************************************************** ************
General analysis of filter quality"
The generic Honda (#1) had a cheap bypass construction, cardbard end caps, and fewer flow holes. It appears to be a typical Fram filter.

#2 was all metal, and had indications of having been purpose built, especially based on the size and opening pressure of the bypass valve, and the number of flow holes. These are important to maintain proper oil pressure and ensure bypassing ony when needed.

#3 was well made, but the smaller filter area and the narrow bypass suggest this filter was not specifically designed for the S2000.

As you can see the honda faired better.