See my questions below their response:
-----------------------------------------------
Thank you for writing ACDelco.
At this time we are only offering the UPF44 and the UPF52 in the Ultraguard
Gold filters. Here are some information that you may find useful regarding
the filter microns.
Duraguard is an excellent filter that will capture particles as small as 25
microns and has a media made of a synthetic/cellulose blend instead of just
cellulose. Cellulose is a wood-based paper product and the term
"synthetic" simply means man made.
The Duraguard Silver media is a blend of synthetic and cellulose material
as well, but is considered a high-performance media because it has a
greater amount of the synthetic filtering material than utilized in the
Duraguard media. This media can trap contaminants down to 15 microns,
which helps reduce engine wear, and has a lower resistance to flow compared
to other premium filters (see below to see why this occurs). Thus more
clean oil is likely to circulate in the engine, especially at critical time
periods when oil flow may be impeded, such as during cold engine startup,
since the engine oil bypass valve is less likely to be utilized. The
Duraguard Silver oil filter also has a Teflon-coated gasket and a static
cling window sticker to record oil changes.
The Ultraguard Gold goes even beyond the Duraguard Silver Filters by
providing a 100% synthetic media that can trap contaminants down to 8-10
microns with an even lower resistance to flow than the Duraguard Silver
filters (see below). In addition this 100% synthetic media is wire backed.
The wire backing helps ensure that the filter media can endure very high
differential pressures, that may occur on cold start up or severe usage,
with less likelihood of internal buckling of the media (which can impeded
oil flow). This highly durable wire-backed media thus helps ensure the
likelihood that the oil will flow through the filter and not bypass the
filter through the oil bypass valve, as may occur on filters with a media
that flows less freely. The Ultraguard oil filter also features a
Teflon-coated gasket, like the Duraguard Silver, that helps to eliminate
leakage and is easier to install and remove.
You may also be asking what's so special about this synthetic media over
cellulose media. And that's a great question! As indicated above, the
term synthetic simply means man-made. The synthetic media used in our oil
filters is made of a fiberglass-like material. The media pores in this
material are more uniform in size and smaller as well, which allow it to
trap smaller contaminants. Even when the media openings are smaller, their
more uniform size and greater number allow excellent oil flow through the
filter. In terms of 20-micron efficiencies, most premium filters perform
very similar. When compared to other premium oil filters the Ultraguard
Gold oil filter has a very low resistance to flow while at the same time
filtering very tiny particles.
We hope that this information was helpful to you!
Thank you for your interest in ACDelco.
ACDelco -----------------------------------------------
To: [email protected]
Subject: ACD - ACDelco - Other Suggestions
Date & Time: 12/28/2002 21:18 EST
Dear AC Delco,
I have a problem regarding oil filters I need help with. Here are my
questions:
1. What is the SAE test efficiency rating of the standars AC Delco
Duraguard oil filters. Single pass and multi pass (in percent) and at what
particle size (micron).
2. Is AC Delco discontinuing the AC Delco Ultraguard Gold and Silver oil
filter lines?
3. How does the AC Delco Duraguard filter flow compared to the high flowing
Ultraguard Gold.
4. If no AC Delco filters are available, what are a few brands of top (!)
quality oil filters you can also recommend.
Thank you very much in advance for the information.
Alex
-----------------------------------------------
Thank you for writing ACDelco.
At this time we are only offering the UPF44 and the UPF52 in the Ultraguard
Gold filters. Here are some information that you may find useful regarding
the filter microns.
Duraguard is an excellent filter that will capture particles as small as 25
microns and has a media made of a synthetic/cellulose blend instead of just
cellulose. Cellulose is a wood-based paper product and the term
"synthetic" simply means man made.
The Duraguard Silver media is a blend of synthetic and cellulose material
as well, but is considered a high-performance media because it has a
greater amount of the synthetic filtering material than utilized in the
Duraguard media. This media can trap contaminants down to 15 microns,
which helps reduce engine wear, and has a lower resistance to flow compared
to other premium filters (see below to see why this occurs). Thus more
clean oil is likely to circulate in the engine, especially at critical time
periods when oil flow may be impeded, such as during cold engine startup,
since the engine oil bypass valve is less likely to be utilized. The
Duraguard Silver oil filter also has a Teflon-coated gasket and a static
cling window sticker to record oil changes.
The Ultraguard Gold goes even beyond the Duraguard Silver Filters by
providing a 100% synthetic media that can trap contaminants down to 8-10
microns with an even lower resistance to flow than the Duraguard Silver
filters (see below). In addition this 100% synthetic media is wire backed.
The wire backing helps ensure that the filter media can endure very high
differential pressures, that may occur on cold start up or severe usage,
with less likelihood of internal buckling of the media (which can impeded
oil flow). This highly durable wire-backed media thus helps ensure the
likelihood that the oil will flow through the filter and not bypass the
filter through the oil bypass valve, as may occur on filters with a media
that flows less freely. The Ultraguard oil filter also features a
Teflon-coated gasket, like the Duraguard Silver, that helps to eliminate
leakage and is easier to install and remove.
You may also be asking what's so special about this synthetic media over
cellulose media. And that's a great question! As indicated above, the
term synthetic simply means man-made. The synthetic media used in our oil
filters is made of a fiberglass-like material. The media pores in this
material are more uniform in size and smaller as well, which allow it to
trap smaller contaminants. Even when the media openings are smaller, their
more uniform size and greater number allow excellent oil flow through the
filter. In terms of 20-micron efficiencies, most premium filters perform
very similar. When compared to other premium oil filters the Ultraguard
Gold oil filter has a very low resistance to flow while at the same time
filtering very tiny particles.
We hope that this information was helpful to you!
Thank you for your interest in ACDelco.
ACDelco -----------------------------------------------
To: [email protected]
Subject: ACD - ACDelco - Other Suggestions
Date & Time: 12/28/2002 21:18 EST
Dear AC Delco,
I have a problem regarding oil filters I need help with. Here are my
questions:
1. What is the SAE test efficiency rating of the standars AC Delco
Duraguard oil filters. Single pass and multi pass (in percent) and at what
particle size (micron).
2. Is AC Delco discontinuing the AC Delco Ultraguard Gold and Silver oil
filter lines?
3. How does the AC Delco Duraguard filter flow compared to the high flowing
Ultraguard Gold.
4. If no AC Delco filters are available, what are a few brands of top (!)
quality oil filters you can also recommend.
Thank you very much in advance for the information.
Alex