Napa / Wix Filters

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The "which oil filter" debate is almost as hot as the oils. The biggest argument seems to be around the 5 micron filtering that Harley claims for their filters. The reason 5 micron is claimed to be important is for the piston oil jets that are .025”-.030” or 635-732 microns (micron= 0.00003937”). So 5 micron seems like overkill to me. The other reason is filter bypass pressure may not be to HD spec. I know many forum riders that use any number of different filters, and like oil, I have never read of a single failure that was proven to be caused by using a wrong filter.

Breeze3at said:

The "which oil filter" debate is almost as hot as the oils. The biggest argument seems to be around the 5 micron filtering that Harley claims for their filters. The reason 5 micron is claimed to be important is for the piston oil jets that are .025”-.030” or 635-732 microns (micron= 0.00003937”). So 5 micron seems like overkill to me. The other reason is filter bypass pressure may not be to HD spec. I know many forum riders that use any number of different filters, and like oil, I have never read of a single failure that was proven to be caused by using a wrong filter.

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Less than 40% of the oil is filtered at any one time anyway.

I wasn't looking for BEST or a giant cross reference list to fog the question... I would like to know if anyone is using the specific items I listed...

Not trying to be a D(Ck, just asking for specific intel.

Thanks folks

misinlink said:

I wasn't looking for BEST or a giant cross reference list to fog the question... I would like to know if anyone is using the specific items I listed...

Not trying to be a D(Ck, just asking for specific intel.

Thanks folks

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Sorry , most folks always want data to back up any opinion on things.

I have used at one time or another , both the Wix and Napa filters on a 98 Evo without any problems that I know of .

webco2 said:

Sorry , most folks always want data to back up any opinion on things.

I have used at one time or another , both the Wix and Napa filters on a 98 Evo without any problems that I know of .

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I wasn't trying to take a shot at you, I understand why you did what you did, but that is how we get 750,000 threads on the best oil.

I apologize if I wasn't clear in my original post, I'm looking for specific data not a buffet to sample.

Thank you for your feedback.
:thumbsup

misinlink said:

I wasn't trying to take a shot at you, I understand why you did what you did, but that is how we get 750,000 threads on the best oil.

I apologize if I wasn't clear in my original post, I'm looking for specific data not a buffet to sample.

Thank you for your feedback.
:thumbsup

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Personally I'm thinking extra virgin olive .........

Yes, I used the Wix 51394 one change interval.

Kainam said:

On Twin Cams, either the 5 or 10 micron is fine.

EVOs call for a 30 micron filter.


Wix equivalent of 63731-99A 5 micron TwinCam filter = 57148 (57348 Chrome).
Part Details

Wix equivalent of 63805-80A 30 micron EVO filter = 51215 (51225 Chrome).
Part Details

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Wix# 57148 = NAPA# 7148
Wix# 51215 = NAPA# 1215

misinlink said:

Okay...
So first off I did a search and did not pull any results...

Has anyone run either the NAPA 1394 or Wix 51394 (last I knew Wix made Napa's filters) on their TC or EVO?

Now the specs appear to be the same as the Moco requirements, I drive by a NAPA daily and frankly I dislike spending money at the dealer.

I don't care how messy an oil change is or I should get the one with the fancy nut on the end and I don't care if it's not chrome, I need it to filter my oil.

And for God sake please do not tell me which oil is best! :what?

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o rieleys have the wix harley filters in b lack and chrome

Wix 51215 filter on my 85 Evo been running Wix for years and you are right Wix makes Napa filters and Have for years .

O'reilleys sell Wix filters too for like 6 bucks



Good Luck Link in you filter Search

I've used Wix, but now days I just order the K&N from Amazon. I have prime, so free 2 day shipping and cheaper. No stop at O'Reilly or the dealer.

Oil is bought by the case from the distributor, for all the family's bikes, (Cousin owns an auto repair shop).

Zelrick said:

I've used Wix, but now days I just order the K&N from Amazon. I have prime, so free 2 day shipping and cheaper. No stop at O'Reilly or the dealer.

Oil is bought by the case from the distributor, for all the family's bikes, (Cousin owns an auto repair shop).

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I get the same filter from the company that manufacturers the K&N for half the price. No fancy box or fancy verbiage on the box, but it's the same filter, same performance. They are made by Hiflofiltro then re boxed and sold for 2x the price by K&N. HF170(B suffix for black) without drain back valve and HF171 with drain back valve. Model numbers look familiar don't they.

I contacted Wix Filters about the 57348 filter that fit’s a 2011 1200 XL Sportster. My question was “Is the filter 57348 made with a glass-enhanced cellulose media or a media that is pure 100% fiberglass?” The reply was “The filter is 100% fiberglass media and will filter the oil cleaner (less particulates, still going to be black from the carbon) then when it was poured into the engine.” I bought one and have not installed it yet. It was 15 bucks and feels heaver that the “Motor Factory” filters. I change my oil every 2000 - 2500 miles. Maybe too often but I am just that way, anal.

They do make Napa and Amsoil filters too.

Grampa Kracker

screw napa - wanted a filter for the riding mower- 13 bucks

my buddy bought one for his (the same filter) and paid 4 bucks ay napa

i guess i look like im made of money driving a 12 year old suv and a cheap toyota thats 7 years old

i use a proflow for the bike- i like thats its a tear down and reuse filter- you can see whats inside when you clean it

What should the bypass pressure be per HD spec. The Wix is 8, not sure what Harley calls for or what K&N 171 filter is either.