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#1622963 - 10/06/09 09:30 PM MicroGreen Filter Photos
slalom44 Offline


Registered: 10/26/03
Posts: 787
Loc: Granville, Ohio
I just completed a 10,988 mile OCI on my '03 Highlander using Mobil 1 5W-30 motor oil. I used a Napa Gold filter for the first 6k miles then changed over to a MicroGreen filter. I had a UOA done and cut open the filter to see how it was constructed. Here is what I found:

Here is a photo of the filter:

This filter is roughly the same size as the stock filter. Here is a photo of the filter next to a Napa Gold filter:

A picture of the base plate:

After cutting the filter open, here is what it looked like:

Notice the plastic bypass unit on the end opposite of the baseplate. Here is a photo looking in the filter from the baseplate end. There was a butyl rubber Anti-drainback valve that did a pretty good job. When I cut the filter open, lots of oil spilled out. Notice the spiral wound perforated steel tube inside:

Here is a photo of the bypass end. A heavy spring is used to keep the unit snug against the baseplate:

This is what it looks like with the spring and the metal cover plate removed:

That dark surface is the top of the sintered PTFE (teflon) bypass disc.

This bypass section comes in two plastic units. The outer section holds the sintered PTFE bypass media, and the inner section holds the bypass valve. In the photo below, I have removed the outer section, exposing the top of the bypass valve. Note that all of the oil that is filtered by the PTFE media goes through that small hole in the inner section.

In the photo below I am pushing down on the bypass valve:

Here is a close-up photo of the top of the PTFE disc:

More to come on the next post.

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#1622966 - 10/06/09 09:31 PM Re: MicroGreen Filter Photos [Re: slalom44]
slalom44 Offline


Registered: 10/26/03
Posts: 787
Loc: Granville, Ohio
The photo below shows all of the components. Notice that I have taken the bypass valve apart and show all of the parts. The bypass valve is very well built. It has a simple construction, which is easy to assemble/disassemble by hand.

I cut open the outer section with the PTFE to see what it looked like. As soon as I cut it with a hacksaw, I realized that it just snaps into the plastic holder:

Here is a side photo of the PTFE bypass media:

Notice that it is quite thin - I measured it to be .085" thick. It's not exactly depth filtration.

Here is what I think of the filter:

The entire unit is definitely well constructed. All components are well built, and nothing appeared to be flimsy. I can't tell what type of filter media the full-flow section is using but based on the appearance and texture, it looks like it is probably a synthetic media.

The one thing I found surprising was the thickness of the bypass media. I guess it doesn't have to be thick to restrict flow of larger particles through a sintered media, but I don't see much volume that can hold particulates. It appears to be effective, but I'd be leery of expecting it to capture a large volume of particulates in a greatly extended OCI. The manufacturer’s website suggests that you change the filter at double the recommended OCI (eg: from 3-5K to 6-10K) but keep the oil in the engine over multiple filter changes, from 24,000 to 30,000 miles. In my opinion this filter change regimen might be fine for this OCI for keeping particulates out but you’d be pushing most oils to have any TBN left over this OCI.

Based on the UOA I had done when I completed the OCI, I'd say that it appears to be doing a good job. It doesn't look like it's as efficient as conventional bypass filters, but it's probably doing a better job than a conventional full-flow filter. The UOA results on my Honda S2000 with an Amsoil BMK-13 setup are better, but that would be expected given the construction and size of the Amsoil bypass filters.

I think this filter is a little pricey for the benefit it provides. I paid around $25 plus shipping for this filter. Their cost savings claims are a little far-fetched considering the price of the filter and the length of time recommended for each filter.

The obvious benefit is its ease of use. It just spins on like any full-flow filter, making it very easy to use. I'm just not convinced of the cost benefit.

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#1622979 - 10/06/09 09:37 PM Re: MicroGreen Filter Photos [Re: slalom44]
Johnny248 Offline


Registered: 07/19/09
Posts: 1805
Loc: Detroit, MI
maybe in a an application such as a FL1A style filter? My Dodge ram uses the shorter Chrysler version of it, may be better in a larger package?
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#1622997 - 10/06/09 09:53 PM Re: MicroGreen Filter Photos [Re: Johnny248]
daves87rs Offline


Registered: 02/23/09
Posts: 13371
Loc: Michigan
Nice Pics!Looks like a good filter, and I'd agree about the price..
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#1623029 - 10/06/09 10:22 PM Re: MicroGreen Filter Photos [Re: daves87rs]
Black_Thunder Offline


Registered: 09/23/06
Posts: 788
Loc: Wisconsin
looks like a real hardcore well built filter.


where are these sold at?
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#1623036 - 10/06/09 10:25 PM Re: MicroGreen Filter Photos [Re: slalom44]
Billy_D Offline


Registered: 06/23/08
Posts: 965
Loc: midwest
Thanks for posting the pictures of the Microgreen filter. It's a well built filter. Just not worth $25.

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#1623069 - 10/06/09 10:55 PM Re: MicroGreen Filter Photos [Re: Billy_D]
OVERKILL Offline


Registered: 04/28/08
Posts: 25897
Loc: Ontario, Canada
In comparison, here is the built-in bypass filtration setup on a Fleetguard Stratapore filter:

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#1623103 - 10/06/09 11:22 PM Re: MicroGreen Filter Photos [Re: OVERKILL]
Johnny248 Offline


Registered: 07/19/09
Posts: 1805
Loc: Detroit, MI
That fleetguard looks awesome. Is that thing available for any auto fitments?
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#1623423 - 10/07/09 11:09 AM Re: MicroGreen Filter Photos [Re: Johnny248]
Gary Allan Offline


Registered: 09/28/02
Posts: 39806
Loc: Pottstown, PA
Good job on the break down.

I'm curious why such an expensive compound was used for the base cap bypass element. PTFE isn't cheap compared to many others of like temp tolerance.
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#1623554 - 10/07/09 01:06 PM Re: MicroGreen Filter Photos [Re: Gary Allan]
addyguy Offline


Registered: 09/08/05
Posts: 13426
Loc: Canada
Very, very interesting design that filter uses. Seems to me to be a modern version of the STP 'Silver Bullet' twin media filter of the 1970's - getting more filtration out of a simple canister filter.

Thanks for this.
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2003 Mazda Tribute LX V-6, 169k miles.
Oil: Edge SPT, PP, and Lucas syn; MPH2 filter.

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#1623602 - 10/07/09 01:45 PM Re: MicroGreen Filter Photos [Re: Johnny248]
OVERKILL Offline


Registered: 04/28/08
Posts: 25897
Loc: Ontario, Canada
Originally Posted By: Johnny248
That fleetguard looks awesome. Is that thing available for any auto fitments?


Well, it is almost a foot long, so I'm thinking probably not.

They do make synthetic glass media filters sold with the Stratapore name on them, that's what I'm running on the Expedition. It would be very neat to be able to run something like this for sure though.
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#1623641 - 10/07/09 02:31 PM Re: MicroGreen Filter Photos [Re: OVERKILL]
Black_Thunder Offline


Registered: 09/23/06
Posts: 788
Loc: Wisconsin
yes unreal how much these cost.

so not for me wink


i would however be interested in the fleetguards.
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I'd buy Callahan autoparts if I could.

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#1623665 - 10/07/09 03:02 PM Re: MicroGreen Filter Photos [Re: Black_Thunder]
snakyjake Offline


Registered: 07/09/08
Posts: 78
Loc: WA, USA
Other options are Baldwin and Donaldson. They both have spin-on bypass filters. Not sure which is better, but both have different perspectives on what is more effective.

Cost is a definite issue. Sometimes I believe in simply changing the oil and filter more often. Less cost, less unknowns. But there's a part of me always seeking something better and hoping for some innovation.

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#1623685 - 10/07/09 03:17 PM Re: MicroGreen Filter Photos [Re: snakyjake]
Gary Allan Offline


Registered: 09/28/02
Posts: 39806
Loc: Pottstown, PA
We all strive to achieve the better mouse trap. Going with the herd will get you there just fine..but sometimes you just have to break formation. Imagine if that one cave man didn't try and roll the log instead of just dragging it like the rest of the crowd?? grin
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#1623720 - 10/07/09 03:47 PM Re: MicroGreen Filter Photos [Re: addyguy]
Steve S Offline


Registered: 01/20/03
Posts: 18449
Loc: East of IGO
Originally Posted By: addyguy
Very, very interesting design that filter uses. Seems to me to be a modern version of the STP 'Silver Bullet' twin media filter of the 1970's - getting more filtration out of a simple canister filter.

Thanks for this.
I remember those filters, do you remember the Lee filters with a filtered bypass?
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