jim said:
Typical minimum requirements for a automotive application were
something
like removing 80% of the 40 micron particle in a single pass. The
96%
rating Fram advertises I beleive is for a particular test which may
be
single pass at 20 microns (I've seen it but don't remember). Any
filter
is well above the minimum requirement. But the single pass test is
a
fairly old test. there have been other tests that are more commonly
used
since then.
"Honeywell testing of filter efficiency and capactiy of models
equivalent to PH8A, 3387A and 6607 under ISO 4548-12 for particles >
20 microns."
From
"SO 4548-12 is derived from the ISO standard for Multi-pass filter
testing (ISO 16889) which is based upon testing of hydraulic filters.
This test requires filter manufacturers to determine the average
particle sizes which yield Beta ratios equal to 2, 10, 75, 100, 200,
and 1000, using the multi-pass test stand approach. The multi-pass
test bench must contain On-Line Liquid Automatic Optical Particle
Counters and calibrated using certified calibration fluid with a known
particle size distribution. Particle counts are taken upstream and
down-stream every minute of the test. The new standard gives a better
interpretation of a filter's overall performance...."
As I said you are the one who claimed the extra filter efficiency
was
unnecessary so don't expect me to now defend your previous position.
I NEVER SAID THAT!!!!!!!!!!!!!!!!!!
Again, what I said was - "If you remove a lot of very small,
non-harmful particles, all you are doing is pluggin up the filter
sooner and reducing flow through the filter element, resulting in the
filter going into bypass mode, and in this case, you aren't filtering
anything."
This is not at all the same as saying - "you are the one who claimed
the extra filter efficiency was unnecessary"
Using which test protocol?
SAE J1858 Full Flow Lubricating Oil Filters Multipass Method for
Evaluating Filtration Performance, Standard
".....SAE J1858.....reviews the ability of a filter to remove
contaminants of a specific size from the fluid stream at a specific
moment in time. The test can be repeated to suggest efficiencies over
the life of the filter. Results are reported as a ratio between the
number of partials of a given size entering the filter and the number
of the same size particles exiting the filter. The difference between
the two is referred to as the BETA ratio."
Which filters are you comparing. Fram has 4 different lines that are
designed to perform differently under various different test
protocols
so that the customer has a choice depending on what they might to
consider important.
See above - "the standard FRAM Filter (the Extra Guard)." Wasn't that
clear enough?
There have been independent laboratories that run the various SAE
tests
and make apple to apples comparisons.
So where can I read one of the tests?
All the advertising literature is
going to highlight the tests where they perform best and not mention
where they don't perform as well.
And they all perform well above the minimum required and any
differences are simply not likely to show up during the life of the
engine if you follow the car maker's maintenance schedule during the
ordinary life of an ordinary car.
Actually I agree with this statement. I certainly believe that regular
filter replacement is important and that replacing a Fram at every oil
change is better than leaving a better quality filter in place for two
or more changes.
The filtering efficiency at different sized particle are all part of
test procedures. As I said any advertising is going to cherry pick
whatever they happen to think makes them look good. It really
doesn't
say anything about how two brands compare when you pick the results
of
one test from one brand and compare it to the results of another
test
from another brand.
So what is your criteria for picking Fram? They are not the cheapest.
In my opinion, they don't appear to be well made. They don't claim
particular good filter efficiency. Is it the Orange paint?
No it can't. Cardboard is used as gasket material all the time
particularly for things that need to seal in oil. . When you torque
something down tight onto such a gasket you put a lot more force on
the
cardboard than the oil does but it doesn't damage it or cause it to
move
anywhere.
This is not the same situation as a gasket. There are no metal
surfaces clamping the paper end caps in place. There is a gap above
the end cap, and only glue holding it to the fitler element below. The
Fram "Extra Guard" construction invloves gluing the open ends of the
filter element to the end caps. I've seen other filters that use just
a simple retainer (think plastic or paper) at the top of the filter
element, but these filters glue the pleates together, closing off the
top of the filter element. Fram just glues the open pleats to the
paper end cap. The only thing holding the end caps to the open ended
pleats is the glue. Try gluing a thing piece of paper perpendicular to
another slightly thicker piece of paper and tell me how well that
works. Most of the time the Fram filters have enough glue to securely
attach the peats to the end cap, but I've cut open used Frams where
the pleats were separated from the end caps. The only other filter
I've seen using a similar construction technique is a Delco.
All filters have a metal containment tube in the outlet.
Not true. Several use plastic (not Fram). For an example see
http://home.earthlink.net/~cewhite3nc/id7.html .
If you
look inside the outlet hole of a Fram you will see the STEEL
containment
cylinder. Look up what all the filter manufactures say about damage
to
or collapse of that center supporting steel tube. They all agree
that if
that center support tube becomes damaged or collapsed there is
something
drastically wrong with the engine or the maintenance that the engine
receives. They all agree that damage to that tube never happens on
an
engine that is working properly and is properly maintained. This is
not
unique to fram. If the filter media collapses and pulls away from
the
end caps why do you think having metal end caps is going to be
beneficial?
Look at the Motorcraft picture I sent you in a link to earlier. The
filter element is potted into a >0.1" thick glue mass contained by the
metal end cap. You might tear the filter media, but you can't pull it
out of the end cap without tearing it (I've tried). I've cut open Fram
filters where the filter media had detached from the end cap - most
likely becasue the glue they used didn't seal the media to the end cap
properly. For good Fram filters, there is a thick bead of glue built
up on both sides of the media, securing it to the end cap. However, it
seems sometimes the bead is thin or mislocated and there is not a good
bond (my theory). This is far less likely to happen with the sort of
metal end caps used by most other filter manufacturers (again, my
opinion).
If the center support tube that you can see when you look down the
center hole isn't damaged there is no way the cardboard on the ends
can
come loose or migrate into the oil flow.
Not ture. Again, go look at the Fram bypass valve and expalin how it
works given your claims.
It is not designed so that
there is any force to pull it apart. If the filter media itself
becomes
damaged or torn or collapsed then that is that on any brand filter.
The
filtering media can colapse and pull away from the metal end cap
just as
easily (or maybe even more easily).
There are tests that are performed to measure the strength and the
ability to withstand dynamic flexing. And all the filters are made
to
meet these specifications.
How do you know that? There is a filter test to test burt strenght of
the can. I don't have a copy of it, so I have no idea if it also
evaluates the whether the Fram end caps stay in place.
Well either you are lying or they only were separated due to the
fact
that you cut them open. Either way its not very interesting. There
is no
way the forces inside an operating filter can cause them to separate
even if they were assembled without any glue( if you left them alone
and
didn't cut them open). SWome filter manufactures that have metal
ends
don't use any glue so how well do you think that seals the ends of
the
filter. But still the ends themselves don't come apart simply
because
all the forces when in operation are working to hold them together.
I don't appreciate being called a liar. I think you are wrong about
the forces not being able to cause a separation. Go look at the
picture of the Fram filter and expalin to me how their bypass valve
works if you are right.
I had a chevy 283 that took a replacement cartridge filter. For 30
years every oil change, I took out a paper cartridge that had
cardboard
on both ends and put in another with cardboard on both ends. This is
a
proven reliable design. There is absolutely no reason to panic
because
you see cardboard
Well made filters with cardboard end caps are OK. This is not always
the case with the standard Fram Filters (the so called "Extra Guard").
I'll bet that your Chevy had relatively thick end caps that were
firmly attached to the end caps. I've had farm tractors that used
cartrigde type filters and never had a concern either. And if they
failed, at least I would have known it when I replaced the filter.
Hard to know what is happening inside the orange can if you don't cut
it open.
By the way - didn't your old cartridge filter include a metal
cannister on the outside and on the inside of the filter media? And
are you sure it did not have metal end caps? I looked up the P/N for
the old Chevrolet V8s I looked them up for several years), and even
Fram's picture of the cartridge shows an external metal can and metal
end caps.
Some just had plain metal end caps, see::
http://www.rockauto.com/catalog/moreinfo.php?pk=55348
http://www.rockauto.com/catalog/moreinfo.php?pk=55345
http://www.rockauto.com/catalog/moreinfo.php?pk=55349
http://www.rockauto.com/catalog/moreinfo.php?pk=55346
I assume these got a separate gasket.
There were also versions that had meal end caps, with a paper gasket
on top. See:
http://www.rockauto.com/catalog/moreinfo.php?pk=55764
http://www.rockauto.com/catalog/moreinfo.php?pk=55767
Or metal end caps and rubber gaskets, See:
http://info.rockauto.com/WIX/DetailWIX.htm?www.wixfilters.com/filterlookup/PartDetail.asp?Part=51123
http://info.rockauto.com/WIX/DetailWIX.htm?www.wixfilters.com/filterlookup/PartDetail.asp?Part=51143
Is that what you had?
I never could find a picture of a Chevy V8 filter with paper end cpas.
I have seen such filters, so I know they exist. My MF175 used
cartridge filters with a metal outer cylinder and paper (thick paper)
end caps. But that filter went in a can that had a spring loaded metal
plate on the bottom and a flat sealing surface on the top. The end
cpas were well suppoted - unlike the paper end caps in a standard Fram
fliter.
The reason to buy one is they work as well as the other brands
and....
You have no proof they work as well, you just think they do. Maybe
they are good enough, but in my opinion, they are not a good choice.
For my use, there are better constructed filters available for the
same money or less. I can't see why I would buy a Fram Filter when
most stores carry filters I like better on the same shelf.
....I
find no particular reason to listen to people who offer advice based
on
their belief in imaginary scenarios of what might happen. I might as
well take advice from people who believe in witchcraft
I think you should have said - "I find no particualr reason to listen
to people who don't agree with my beliefs <period>." As far as I can
tell, you don't have a sound scientific reason for preferring Fram
filters over other brands.You "believe" "they work as well as the
other brands," but don't actually have any proof of this and in fact I
am not even sure what you are including in your list of "other
brands." If I am wrong, enlighten me. Otherwise, how is our opinion
different from "people who believe in witchcraft."
Fram fiilters may be "good enough," but I can't see spending more to
get a barely adequate filter, when for less I can get better than
adequate. If a Motorcraft or Wix fitler cost significantly more than
the standard orange Fram filter, then I might reconsider and buy the
Fram. But, I can't see paying more or even a little less for a Fram
filter. Even if the end cap joint is 100% reliable, the standard
(Extra Gaurd) Fram filters still appears to have an inferior
anti-drain back valve (comapred to the equivalent Motorcraft) and an
inferior bypass valves (compared to almost any other filter). The
higher priced Fram filters do include the better silicone
antidrainback valve, but they cost far more than Motorcraft filters
that include this feature as standard.
Ed