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Not happy with last year's #1806 oil filter
https://www.slantsix.org/forum/viewtopic.php?t=68612
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Author:  wjajr [ Wed Apr 22, 2026 8:52 am ]
Post subject:  Not happy with last year's #1806 oil filter

It's oil change time now that the roads are salt free. For 18 years now I have been using a Napa 1806 oil filter. This last one seemed to leak down over night causing the low oil light to be slow going out on start-up compared to previous filters. It is my understanding that Napa's filter supplier changed, and perhaps the new line is not constructed the same as the old units.

Is there a different recommended filter to prevent the drawn-out low pressure time (~5 seconds) at start up? I aways have used 10W30 oil.

Author:  mr.norm [ Wed Apr 22, 2026 9:14 am ]
Post subject:  Re: Not happy with last year's #1806 oil filter

I have noticed the same thing with the last two that I bought. Two different engines even.

Author:  Jase [ Wed Apr 22, 2026 9:48 am ]
Post subject:  Re: Not happy with last year's #1806 oil filter

Does your oil pump have the stand pipe tube? Mine came loose a few year ago and I suspect it was causing a slow oil pressure rise...

These are options for filters with a standpipe built into them: https://bobistheoilguy.com/forums/threa ... st-1945352

Author:  SlantSixDan [ Wed Apr 22, 2026 5:13 pm ]
Post subject:  Re: Not happy with last year's #1806 oil filter

See here.

My daily driver gets an oil + filter change once a year, and the "quality" of parts store filters is to the point where I spend the premium price for Fleetguard or Donaldson.

Author:  wjajr [ Thu Apr 23, 2026 9:10 am ]
Post subject:  Re: Not happy with last year's #1806 oil filter

The oil pump never had a stand pipe as long as I have had the car; 18 years.

Dan, is the Fleetguard number FJ-3103 which replaces LF701 the filter you use?

Author:  Greg Ondayko [ Thu Apr 23, 2026 9:59 am ]
Post subject:  Re: Not happy with last year's #1806 oil filter

Quote:
See here.

My daily driver gets an oil + filter change once a year, and the "quality" of parts store filters is to the point where I spend the premium price for Fleetguard or Donaldson.
So, wix 51515 is on the naughty list?

Sorry, Da,n your linky is blocked here at work; will do additional clickage on a different connection later.

Greg

Author:  SlantSixDan [ Thu Apr 23, 2026 1:04 pm ]
Post subject:  Re: Not happy with last year's #1806 oil filter

Quote:
Dan, is the Fleetguard number FJ-3103 which replaces LF701 the filter you use?
Naw, it's a completely non-Slant-6 engine. But if I were shopping for a dependably-very-good oil filter for a Slant-6 today, it'd be a Fleetguard LF3487 or Donaldson PS50008 (premium media, no standpipe),

or Fleetguard LF551A (no standpipe),

or Fleetguard LF701 or Donaldson PS54403 (should have standpipe but I haven't looked).

Author:  wjajr [ Thu Apr 23, 2026 2:10 pm ]
Post subject:  Re: Not happy with last year's #1806 oil filter

Thanks Dan.

Author:  hyper_pak [ Mon Aug 17, 2026 5:12 pm ]
Post subject:  Re: Not happy with last year's #1806 oil filter

Dan, any thoughts on NAPA 1196?
Industrial Hyd Filter.

Attachments:
OIL Filters (5) NAPA 1196.jpg
OIL Filters (5) NAPA 1196.jpg [ 27.98 KiB | Viewed 1829 times ]

Author:  SlantSixDan [ Mon Aug 17, 2026 5:24 pm ]
Post subject:  Re: Not happy with last year's #1806 oil filter

Not suitable. This is not an engine oil filter. And even if it were, it wouldn't fit (wrong thread size).

Author:  hyper_pak [ Mon Aug 17, 2026 5:26 pm ]
Post subject:  Re: Not happy with last year's #1806 oil filter

Quote:
Not suitable. This is not an engine oil filter. And even if it were, it wouldn't fit (wrong thread size).
.

Thanks Dan
Ask and you shall find out

Author:  SlantSixDan [ Mon Aug 17, 2026 5:58 pm ]
Post subject:  Re: Not happy with last year's #1806 oil filter

As for what happened to NAPA's filters:

They're not made by Wix anymore. Now they're made by a Chinese outfit called Premium Guard. You can see an interesting coupla videos here and here. In the first video, a shop owner raises eyebrows and objections to the switch. In the second video, he recants and says he was contacted by NAPA and they educated him, you see, that there is no reason to object to the Chinese filters because they meet all NAPA specifications.

Maybe the Chinese filters really are awesome, or maybe he's leaving out the part where he got threatened and/or bribed and/or ???? between the first and second videos.

Seriously: Are they lower quality? Almost certainly yes, along with the quality of virtually all other auto parts for all kinds of vehicles now.

As to "meets all NAPA specifications": Uh-huh, right, but those specs aren't carved in stone, and when MBAs (…private-equity firms, hedge funds…) replace engineers, the first question they ask is "How much cheaper can we make these and still get away with it?".

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