Speaking strictly from experiences I've had with the one in Jefferson City.

good read, and interesting you managed to find a fleetguard filter

Anyone else have pressure numbers to add? Would be nice to build & have an archive of oil filter/pressure reference. Of course it is important that the results from one filter to the next be tested on the same engine.

For example: The poster might say that on "X" (the posters' car) Amsoil filter made 60 @ idle cold & 50 @ temp. The Wix made 58 @ idle & 46 @ temp. The Royal purple made 60 @ idle & 52 @ temp...etc. These are just examples, not posted as ref material.

Could also include pressure @ WOT.

I have never seen an O'Rieleys but Im hoping I can find it at Nappa down the street from me. I was able to find the Wix Xp on Amazon for $11.04, not sure if thats a good deal but thatll be my last resort if I cant find it locally.

There's a small place in Milford I got a Wix XP from a few years ago, I'm sure they still sell them. Normally I just use a Napa gold or Car Quest blue filter since they are both the same thing made by Wix.

^Good to know

Can I assume that all of the oil filters tested are applicable (and installable) to/on an LS1 engine?

Chad

The Fleetguard and Wix do but they're taller than stock and will stick under the oil pan just a bit.

You can order a wix xp off amsoil.com for 9.10ea
Not sure of the going rate just letting people know.

What's the difference between the regular black wix filters and the XP's?

I asked this earlier about the regular wix and you said "it's up there" and well, no, it's not up there.

Maybe when I get home later this month I'll buy a few, like a Purolator, Puraolator pure 1, regular black wix, and even a K&N and add to this.

Good writeup! If people want to see other filters examined they should donate them. Im sure this can get pretty expensive for Paul.

I use K&N oil fters test those.

Sheer curiosity here, but all we're doing is looking at the media. Is it really telling us anything? There's no "testing" going on so to speak.

Just a thought.

One of the key factors in selecting a filter should be the size of the particle filtered.

How many micro?

Amsoil EA 15K32 20 micron
Wix 51042 10 micron

However the Wix stated it captures more 10-12 micron particles than other cellulose/synthetic blend medias. Not that it had 10 micron mesh.

If I have time later I will look up other filters.

Thanks SS, that's interesting.

I went to the web sites for the other filters. None of them listed a micron size. I find this interesting. They use to list that kind of information.

I'm looking for a filter i can find locally like the Napa gold,Plat or Wix xp so i dont have to rely on ordering fleetguards and finding them. Does Napa make a long Plat. filter and how much different is it from the Wix XP and Gold's i know Wix makes them all?

I looked, and I'm using the WIX 57045 filter. Is this considered an "xp" filter, and if not, what is the difference. This particular filter is the longer version.

It's not the XP version.

The XP versions have XP in the number and on the can.

The regular version has the standard paper media. It's a very good regular filter on par with a K&N or Mobil1 Extended.

The XP version has a synthetic media that's backed by a metal screening. It will filter better and last longer.