Correct oil filter

[Joseph K.]

In the judging manual for the 68 and 69 it shows a picture of the PF 25 oil filter and the embossing on the filter. I surched the net and found several sites that say they have the "correct" filter. But.... looking at the pictures of the filters none of the filters has embossing on the bottom of the filter like the judging manual. Even filters advertised as NOS do not have the embossing on the bottom. Does any one sell the PF25 With the words "best way to protect your engine replace with AC"???

[Dick W.]

Re: Correct oil filter

The embossed filters have been out of production for 20? or so years. For '68 the PF 25 was not the correct filter. I am having late day brain fade for the correct number, but the new 1968-'69 TIM & JG will reflect the new info

[Dale C.]

Re: Correct oil filter

I think it is PF 29, a little taller.

[Joe L.]

Re: Correct oil filter

I think it is PF 29, a little taller.

Dale------


Yes, PF-29 and that filter had no embossments on the bottom. It's possible that early 1969 also used the PF-29. I have a friend that it the original owner of an October, 1968 built 1969. He tells me that he still has the original oil filter stored "somewhere" in his basement. If I could get him to find it, we might have a data point on this.

[Joe L.]

Re: Correct oil filter

The embossed filters have been out of production for 20? or so years. For '68 the PF 25 was not the correct filter. I am having late day brain fade for the correct number, but the new 1968-'69 TIM & JG will reflect the new info

Dick------


The embossed PF-25 has been out-of-production for longer than 20 years. In fact, a LOT longer. More like 40 years.

[Paul O.]

Re: Correct oil filter

Joseph Here are a few photos the first is a PF-29 use on all 1968 then till about S/N 10K in 69 then the embossed PF-25 till the end of 69 production. So depending what S/N your car is and I am assuming it is a 1969 then it would have one or the other filter. An embossed PF-25 just sold on Ebay for $169 plus shipping 2 days ago hope this helps. Just to add there is an original PF-29 on ebay with a buy it now $100.



KGrHqUOKowE1z5YuDkkBNwhdc7CIQ_12.JPGPF-25 Embosed 001.jpg PF-25 Embosed 002.jpg

Paul 18046

[Joseph K.]

Re: Correct oil filter

Thanks for the responces. I will look on ebay

[Hank H.]

Re: Correct oil filter

Paul, all- what about 1972. JM states "there is strong evidence that un-embossed filters were used during this time too"

[Paul O.]

Re: Correct oil filter

Hank

By 1972 I would expect to see an non-embossed filter but others may have a different opinion on this.

Paul 18046

[Patrick H.]

Re: Correct oil filter

Hank

By 1972 I would expect to see an non-embossed filter but others may have a different opinion on this.

Paul 18046

Agreed. .

[Dave S.]

Re: Correct oil filter

Agreed. .

I think the embossed PF-25's were phased out in 1970 and the smooth bottom PF-25's began in MY 70 at some point. I would expect mid/late 1970, 1971 and 1972 to have the smooth bottom filters.
My $0.02

[Joe L.]

Re: Correct oil filter

All------


As I recall, Don Griffin once reported on the manufacturing change-over period for the embossed to the smooth filters. I expect that post is in the archives.

[Dave S.]

Re: Correct oil filter

All------


As I recall, Don Griffin once reported on the manufacturing change-over period for the embossed to the smooth filters. I expect that post is in the archives.

Joe,
Don Griffin's post says he thinks the change from embossed to smooth was January 1972. I have seen a lot of AC Delco filters in original boxes and the smooth bottom filters are commonly seen in boxes with 1970 dates on them.
Why would they service smooth bottom PF-25's in 1970 and install embossed filters at Flint until January 1972. ???? Just doesn't make any sense to me.

[Paul O.]

Re: Correct oil filter

I am about on the same page as Dave but I think the change is some time in early 1971. After owning at least 100 old filters like Dave many with non-embossed dated 1970.


Paul

[Lyndon S.]

Re: Correct oil filter

maybe they used a black embossed PF-25 filter on the cars then a white PF-25 filter for over the counter service?