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I recently bought a new Suzuki. Suzuki motorcycles come with a very non-standard 20mm x 1mm thread size, with the result that your choice for filters is quite limited, and there are no automotive filters that will fit. So, I decided to take some filters apart and see for myself what the available options are and how they compare.

The nominal specification for the Suzuki filter is 20 x 1mm threads, 11 psi by-pass valve, anti-drain back valve. The columns below are Media pleats * depth * height, media square inches, anti-drain back valve material, seal material, Mechanical grade, Media grade. In these days of rampant grade inflation, I feel compelled to point out that here "C" means average. I'm not interested in the filter's self-esteem.

I get a lot of emails from Suzuki owners asking me what the secret best filter is. They're all trash. All of them. You are forced by Suzuki's brain-damaged specification to buy and use trash oil filters. There's now an alternative, you can buy an adaptor for $15 that allows you to use PL14610 or Supertech ST7317 filters, the same thing used by Honda, Yamaha and Kawasaki bikers.

I bought these filters with my own money, and as should be apparent, I got no use out of them in terms of filtering oil.

Type [2] filters for Suzukis

Filter Price Media p*d*h Sq.In. Drain Seal Mech. Media Comments
AMSOil
SMF 109
$8.75 45*.37*1.1 37 Nitrile Nitrile C B Advanced media, but not much of it. A flawed superior filter.
Emgo
10-55660
$6 61*.48*1.3 76 Nitrile Nitrile C C Good alternative to OEM
Emgo
10-55662
$7.75 35*.3*1.24 26 Nitrile Nitrile C B Advanced media, but not much of it. A flawed superior filter.
Fram
PH6018
$6 44*.49*1.77 76 Nitrile Nitrile F C Normal filter paper, and a decent amount of it. Cardboard end caps, Little prongy plastic bypass valve. Unconvincing anti-drainback valve. A study in how to make a filter on the cheap.
Hi-Flo
HF138
$5.50 49*.51*1.6 80 Nitrile Nitrile C* C An average filter at a competitive price.
J.C.Whitney
ZX063166P
$6             on order. . .
K&N 138 $12 62*.315*1.5259 Nitrile Nitrile C+* C Made by Hi Flo. Average filter with a $6 nut welded onto the end cap.
NAPA 1359
WIX 51359
$9 49*.365*.97 34 Nitrile Nitrile C C- Bypass filter added on, not built in. Filter media in short supply.
Parts Unlimited $9 50*.41*1.46 60 Nitrile Nitrile C C Average filter, high price.
Per-Form
J-509
              Not tested at this time.
Purolator
ML16818
              Not tested at this time.
STP SMO-18 $6 49*.38*1.3 48 Nitrile Nitrile C C- Filter media in short supply. Below average.
Suzuki
16510-03G00-X07
$12 59*.41*1.47 71 Silicon Nitrile B C A slightly better than average filter at a super-premium price.
VESRAH
vsf-3009
$11             on order. . .

* - I received an email from Suzuki of Victoria, informing me that a Hayabusa they took in for service showed no oil pressure. They found the cause was an aged anti-drainback valve on a Hi-Flo filter that would not open, thus cutting off all oil pressure to the entire engine.


STP, Emgo 55662, Emgo 55660, Suzuki, Fram Oil Filters.


K&N, Hi-Flo, Parts Unlimited, Napa Gold, AMSOil Oil Filters.


Pure One, Bosch, SuperTech Oil Filters.

Type [5] Filters for Hondas, etc.

Filter Price Media p*d*h Sq.In. Drain Seal Mech. Media Comment
Bosch 3300 $6 49*.36*1 34 Nitrile Nitrile C B This is the smaller unit. Nice filter media, but not much of it.
Mobil-1
M1-108
$12 43*.39*.96 32 Silicon Nitrile B B This is the smaller unit. Nice filter media, but not much of it. This was a used filter, hence the color of the media.
Pure One
PL14610
$6 50*.39*2.36 92 Silicon Silicon A A This is how an oil filter should be made. The anti-drainback valve is double the thickness of any other here, and obviously seals very well. The media is the best available, and there's a lot of it. The bypass valve is made from a laser-cut piece of stainless steel, and just can't bind or jam.
SuperTech
ST7317
$2 33*.36*1.9 49 Nitrile Nitrile C B A better than average filter at a bargain price.

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