PF-25 Oil Filters

[Edward S.]

I have the opportunity to purchase a few Oil Filters #PF-25 still in original boxes in great shape. Box lists that it fits all Chevy V-8's from 68 thru 76, also has other GM applications for buick, olds & pont. Fits studebaker L6 1965/66. Can't find anything on these in the archives, I would like to pay a fair price - anyone out there who can tell me what they go for? The filters are a med. blue with a black label with white and some red lettering. Appreciate any help you can provide.

[Edward S.]

Re: PF-25 Oil Filters

Should be clearer in that I found nothing in the archives that could be be used in come up with a cost - also boxes have Part Number 6438261. Thanks.

[Larry M.]

Re: PF-25 Oil Filters

Ed:

The original PF-25 oil filters were white with blue/red lettering and logos. This was later changed to the medium blue with various colored labels.

Paragon has recently reproduced the original white type with a price of $40. They are also selling the blue body ones for $35, since the blue ones are still correct for some of the later cars. However, because of the various labels used throughout the years, the ones you describe may be "correct" for only a few model years.

Not sure of a fair market price....I might be inclined to offer $10-15 each.

Larry

[Don G.]

Re: PF-25 Oil Filters

During 1976, a label change was made from a foil background for the GM and AC logo to an all paper label. The foil design was used from late '74 to early '76. The all paper label was used from late '76 through '81.

In my opinion, the foil label filters are worth about $45-$55 and the paper label filters about $ 35-$45.



What label design do they have?

[Jim T.]

Re: PF-25 Oil Filters

How many points are lost if you have an AC filter, but not the color/exactness that came on your Corvette?

[Chuck L.]

Re: PF-25 Oil Filters

Hi Don,
Can you believe paying $40+ for a $1.50 oil filter? I had a whole bunch of PF-25's when they fit 59 Chevy's. I think they even fit my 54 Ford, but that's at least 54 years ago. Can't believe I remember an oil filter better than what happened this morning.

Chuck

[Edward S.]

Re: PF-25 Oil Filters

The fellow I met still has the filters, from what I remember the labels were paper and now that I think of it the backgroud was a darker blue with all white printing and a large white AC in a red circle. Thats about all I remember, I do remember he say's that he bought them somewhere between 1975 thru 1977 when he owned a V8 chevy. Thanks.

[John D.]

Re: PF-25 Oil Filters

Ed, There were a ton of running changes on those filters. They are still available in Canada I heard. For judging purposes the last ones made are not the same configuration. Not correct. I would guess that your friends filters are the real deal and I highly suggest you get them. If you dont' want them later on you won't have any trouble selling them. John

[Don G.]

Re: PF-25 Oil Filters

I believe a filter manufacturer in Canada was licensed to build the AC PF-25 design for the aftermarket. It was white with red/blue sikscreened printing very much like the OEM filter on 1971-early74 Corvettes. However, the silkscreened printing was bilingual and the lockseam was painted white. The last I knew, they were still available in Canada. An informed judge would take a small deduction for these minor differences.

All reproductions that I have seen have minor differences from the correct OEM designs.

All this being said, the points lost between a correct original filter and a more current AC design is minimal and probably doesn't justify the premium cost for original filters. However, for some of us, the satisfaction of getting it right is priceless!

[Kenneth T.]

Re: PF-25 Oil Filters

I believe a filter manufacturer in Canada was licensed to build the AC PF-25 design for the aftermarket. It was white with red/blue sikscreened printing very much like the OEM filter on 1971-early74 Corvettes. However, the silkscreened printing was bilingual and the lockseam was painted white. The last I knew, they were still available in Canada. An informed judge would take a small deduction for these minor differences.

All reproductions that I have seen have minor differences from the correct OEM designs.

All this being said, the points lost between a correct original filter and a more current AC design is minimal and probably doesn't justify the premium cost for original filters. However, for some of us, the satisfaction of getting it right is priceless!

If my memory serves me, did the original White PF-25 filter also have raised lettering on the bottom of the filter? I have never seen repros with it.

Ken

[Stuart F.]

Re: PF-25 Oil Filters

Just remember, you must test fit each one on your car to be certain the label ends up facing outward for judging when tight. Really, some people are quite fanatic about this. I know of some folks that would buy a whole case and test them all until they found one or two that met that criteria, then pulled them off and set them aside to reapply (change oil) just before having their car judged. Just thought I'd throw that into the mix.

I don't have that problem with my canister PF-141's.

Stu Fox

[Joe L.]

Re: PF-25 Oil Filters

If my memory serves me, did the original White PF-25 filter also have raised lettering on the bottom of the filter? I have never seen repros with it.

Ken

Ken-----


Yes, the original PF-25 had raised, embossed script on the bottom.

[Don G.]

Re: PF-25 Oil Filters

Ken & Joe

The engineering change to remove the lettering from the shell was January 3,1972.

The actual date of implementation is not known but most likely occurred late in the 1972 model.

[Don G.]

Re: PF-25 Oil Filters

Stu

As a judge, I would not expect the owner to position the filter for easy reading of the label. In production, I am sure that no attempt was made to orient the label in any way. Mirrors are quite effective to check most label features but any feature I can't see,I would consider using the "visually obstructed rule" and rule in favor of the owner.

[Joe L.]

Re: PF-25 Oil Filters

Stu

As a judge, I would not expect the owner to position the filter for easy reading of the label. In production, I am sure that no attempt was made to orient the label in any way. Mirrors are quite effective to check most label features but any feature I can't see,I would consider using the "visually obstructed rule" and rule in favor of the owner.

Don-----


I totally agree. In fact, the way I see it, it would have been impossible for assembly workers at the assembly plants to orient the filters so that the label was oriented in an "easily readable" sort of way. Wherever the label ended up when the filter was torqued to specification, is where the label ended up.

Of course, it would have been theoretically possible that during the manufacture of the filters, the flange plate could have been oriented in such a way that when the filter was torqued to specification, the label would be positioned in an "easily readable" sort of way. We both know that didn't happen, though:

1) filters were used for different applications; what would be "easily readable" for one, might not be for another;

2) there would have been no reason to make PRODUCTION filters any different than SERVICE filters in regard to label positioning; if it was considered important for the labels to be "easily readable" in PRODUCTION, the same rationale would have held for SERVICE. We all know that on SERVICE filters the labels end up in random positions when the filters are installed.