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1997 Professional Chassis Raised Roof Presidential Limousine
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Discussion Starter #1
Did a search and came up empty. Choices are PF52, PF61, PF61E, PF61F. For 2008.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Wix 51522

Your 1997 is not a late model "DTS". Otherwise, please check the filter manufacturer's application sheets for a ??? 2008.
 

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White Diamond '03 DHS (with DTS floor shift)
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Pretty sure all of the PF61's fit. Difference is probably some slight modification.
Not sure about the 52, but it might be a predecessor.
 

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98 DeVille, 97 DeVille d'Elegance
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Minor internal differences in 61 models like anti drain back but they all fit N*, the 52 is not listed as fitting N*. I see it for LT1, some 3.8 maybe. You'd have to check threads, gasket size and outside dimensions before using.
 

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1992 DeVille
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2,339 Posts
1969byrdman said:
I'm with Sub on this one. Wix. AC Delco is fine. I avoid Fram.
Different engine I know, but last time I used a wix and noticed that my acdelco filter has more holes on the top of the filter for more efficient oil flow. I'll probably always use acd in the future
 

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The tapping plate holes have very little to do with oil flow - the weave and amount of filter media is the main restriction there.

The WIX 51522 for the Northstar actually has larger inlet holes than most other like filters. The HD Fram next to it is used on the Olds 455 marine engine adapters. In the first link, compare the number and size of the tapping plate holes in the WIX and 2008 Ecore (AC Delco) pictures. About the same inlet area, no ???

Do some study ...................

http://www.minimopar.net/oilfilters/

http://www.minimopar.net/oilfilters/opinions.html
 

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1992 DeVille
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Submariner409 said:
The tapping plate holes have very little to do with oil flow - the weave and amount of filter media is the main restriction there. The WIX 51522 for the Northstar actually has larger inlet holes than most other like filters. The HD Fram next to it is used on the Olds 455 marine engine adapters. In the first link, compare the number and size of the tapping plate holes in the WIX and 2008 Ecore (AC Delco) pictures. About the same inlet area, no ??? Do some study ................... http://www.minimopar.net/oilfilters/ http://www.minimopar.net/oilfilters/opinions.html
Interesting. From a purely physical standpoint (internals aside) it seems more holes/ports would equal more flow

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Thanks for the links sub I definitely will
 

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Remember: Small holes present more flow restriction than large holes - turbulence. 8 small holes would probably present about the same flow volume as 6 larger ones. Look at some of the current Purolator filter tapping plates (store filter shelves) - they tend so use slightly oval holes.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Nope. An engine oiling system is hydraulic - if the internal guts have the proper clearances oil pressure builds and flows - and the oil filter inlet holes are designed to pass a LOT more oil than necessary for an engine in good condition. Unles the engine is severely worn, oil pressure is determined by rpm, oil temperature (~190 - 215 is ideal), oil pressure relief spring, and the total of all internal lubricated bearings condition. Pressure and flow is lubrication (and cooling) - simple pressure is not.

Calculate the area of the inlet holes compared to the area of the center (outlet) threaded hole. Gonna be pretty close, regardless.

Oil pressure relief and bypass spring/plunger ....................... For most GM, about 55 - 60 psi.
 

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