Purolator L20073 and K&N HP-2009 cut open

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1,114
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Roseville, CA
The L20073 is an old stock filter from the 96% efficiency days. It spend 5-6k miles with regular oil on a 97 Accord with the F22B2 engine. The HP-2009 is of somewhat recent production. It spent 9-10k with PU synthetic on the 04 Corolla. The L20073 media has 64 pleats and the surface is 216 sq in. The media is much thinner than on the K&N filter. The HP-2009 media has 51 pleats and a surface of 164 sq in. The can on the K&N filter is overkill, and even more so for the filter base. Enjoy.
 
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Originally Posted By: zorobabel
The L20073 is an old stock filter from the 96% efficiency days. It spend 5-6k miles with regular oil on a 97 Accord with the F22B2 engine.
Pretty old ... made on Dec 27, 1996.
 
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Western Canada
The last K & N I had leaked from a spot weld holding the "nut" on... a buddy had one do the same... I smelled burning oil shortly after an oil change, and just thought the usual burn off some spillage scenario... but the smell persisted, and I even had smoke from under the hood... I took a CLOSER look , thinking the filter was loose or leaking at the seal, but it was SPRAYING! out the safety wire hole... onto the header. First oil filter failure, EVER...! Oh, the filter was made in Korea... not the USA like the previous 10 or so I used... I don't run K & N any more....
 
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Northern Kentucky
Yep geeman, you did good running from the Korean K&N filters, they are now midrange filters at a premium price. I recommend a Fram Ultra as a total replacement for the fiktrr with superior stats to even the made in USA K&Ns.
 
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14,640
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The Old North State
Nice dissection and write up, both look good. Lots of media on the older Puro PP, first one I can remember seeing cut open here. Even without the age of the filter considered, held up well. Shows how Honda has now downsized it's filter applications. K&N has Champ M1 type thread end bypass design. Thanks for the pics.
 

pbm

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New York
So you used an 18 year old filter without any problems? I'm glad to see that as I have a number of older oil filters (including Purolators) in my stash. How did you store these filters? PS: I thought the L14458 was the oversized Purolator for older Hondas (it was discontinued several years back)?
 
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Grand Rapids, MI
Originally Posted By: ZeeOSix
Originally Posted By: zorobabel
The L20073 is an old stock filter from the 96% efficiency days. It spend 5-6k miles with regular oil on a 97 Accord with the F22B2 engine.
Pretty old ... made on Dec 27, 1996.
Are you sure it's from 1996? I have a Purolator Premium Plus from 1997 and the box looks different than that. The blue boxes came later than this... perhaps it's from 2006? Here's the one I have, with a copyright date of 1997: The date code on this one is F05M 11C1
 
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Originally Posted By: ThirdeYe
The date code on this one is F05M 11C1
Here's the year codes for Purolator oil filters. Year of manufacturing repeats every 26 years based on the alphabet. They may skip letters such as I and O as they look like numbers (sometimes done in industry). Know for a fact that the most current A is 2009. A 1983 B 1984 C 1985 D 1986 E 1987 F 1988 G 1989 H 1990 I 1991 J 1992 K 1993 L 1994 M 1995 N 1996 O 1997 P 1998 Q 1999 R 2000 S 2001 T 2002 U 2003 V 2004 W 2005 X 2006 Y 2007 Z 2008 A 2009 B 2010 C 2011 D 2012 E 2013 F 2014 G 2015 H 2016 I 2017 J 2018 K 2019 L 2020 M 2021 N 2022 O 2023 P 2024 Q 2025 R 2026 S 2027 T 2028 U 2029 V 2030 W 2031 X 2032 Y 2033 Z 2034
 
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Grand Rapids, MI
Originally Posted By: ZeeOSix
Originally Posted By: ThirdeYe
The date code on this one is F05M 11C1
Here's the year codes for Purolator oil filters. Year of manufacturing repeats every 26 years based on the alphabet. They may skip letters such as I and O as they look like numbers (sometimes done in industry). Know for a fact that the most current A is 2009. A 1983 B 1984 C 1985 D 1986 E 1987 F 1988 G 1989 H 1990 I 1991 J 1992 K 1993 L 1994 M 1995 N 1996 O 1997 P 1998 Q 1999 R 2000 S 2001 T 2002 U 2003 V 2004 W 2005 X 2006 Y 2007 Z 2008 A 2009 B 2010 C 2011 D 2012 E 2013 F 2014 G 2015 H 2016 I 2017 J 2018 K 2019 L 2020 M 2021 N 2022 O 2023 P 2024 Q 2025 R 2026 S 2027 T 2028 U 2029 V 2030 W 2031 X 2032 Y 2033 Z 2034
Hmm, that's so weird. The box clearly states a Copyright date of 1997, yet the filter would be dated 1995? I suppose it is possible that someone swapped the filter inside as I did buy it from a thrift store, but that wouldn't really explain why his box is newer than 1997, yet has an older date code.
 
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The Old North State
Quote:
...Hmm, that's so weird. The box clearly states a Copyright date of 1997, yet the filter would be dated 1995? I suppose it is possible that someone swapped the filter inside as I did buy it from a thrift store, but that wouldn't really explain why his box is newer than 1997, yet has an older date code.
Since the subject has been broached and a seeming discrepancy in box to can date noted, here's my take and I've mentioned it before on another thread. There is an assumption with the letter for year code that I'm not convinced is/has been proven beyond all doubt. It's true that the first letter 'A' does represent 2009. It's known because afaik member Mustang20008Z was the first one to decode the date code as posted in the linked thread. http://www.bobistheoilguy.com/forums/ubb...ode#Post1744244 That also makes sense because that was the first year of production of the new more efficient rated Classic and yellow textured P1, superseding/updating the Prem. Plus and blue can P1. That could be just a coincidence that the new filters just happened to fall when the new letter A came around. Or 'A' was used to start a new series of updated filters in 2009 when the new filters were introduced. If that's the case Purolator could have done a similar updating of filters also using other new A letter along the way. So, it's possible 2008 was letter Z, but imo it's also quite possible that it was some other letter preceding Z and went to A with the introduction of the newer/updated Classic and P1. If the latter is true which I believe is probable, the last letter before 2009 may well not be Z and the same could be said for any update, either filter, box or both that may have taken place prior to 2009. I believe the letter code to be accurate from 2009 to the present. For the reasons given, not convinced it's backward accurate prior to 2009 going back ad infinitum. My.02
 

zorobabel

Thread starter
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1,114
Location
Roseville, CA
Thanks for replies! I appreciate the thanks. I didn't know they changed the manufacturer for K&N HP oil filters, I've still got 3 HP-2009 and 4 HP-1003 left. I picked up the 20073 at PepBoys 3 years ago, obvious old stock. I assume it was stored on the shelf. I stored it (with the rest of my stash) in a closet at 60F-90F, low humidity. I didn't have any issues using the filter, no dry starts. The filter was mounted horizontally in the Honda. The ADBV was harder than on the KN, showing it's age there I guess. This particular engine was hard on oil filters, I had filtering media tears in 3 wally ST3593A in a row with 4-5k miles on them; I switched to Purolators after that. @pbm - I believe the oversized Honda filter you're thinking of was 24458 not 14458. It is discontinued, as is the 20073.
 
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1,607
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USA, FLA
Originally Posted By: geeman789
The last K & N I had leaked from a spot weld holding the "nut" on... a buddy had one do the same... I smelled burning oil shortly after an oil change, and just thought the usual burn off some spillage scenario... but the smell persisted, and I even had smoke from under the hood... I took a CLOSER look , thinking the filter was loose or leaking at the seal, but it was SPRAYING! out the safety wire hole... onto the header. First oil filter failure, EVER...! Oh, the filter was made in Korea... not the USA like the previous 10 or so I used... I don't run K & N any more....
K&N Oil Filters are made in Mexico now... not sure you were aware?
 
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