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PostPosted: Wed Apr 22, 2026 8:52 am 
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Supercharged
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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.

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PostPosted: Wed Apr 22, 2026 9:14 am 
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I have noticed the same thing with the last two that I bought. Two different engines even.

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PostPosted: Wed Apr 22, 2026 9:48 am 
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EFI Slant 6

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Car Model: Slant Six M37
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


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PostPosted: Wed Apr 22, 2026 5:13 pm 
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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.

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PostPosted: Thu Apr 23, 2026 9:10 am 
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Supercharged
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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?

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

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PostPosted: Thu Apr 23, 2026 9:59 am 
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Supercharged
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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

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PostPosted: Thu Apr 23, 2026 1:04 pm 
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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).

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PostPosted: Thu Apr 23, 2026 2:10 pm 
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Supercharged
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Thanks Dan.

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