I've been using Wix filters recently - they're what my favorite hi-perf local parts store (Baxter's for people in the area) sells.  I asked those guys if the extra $$ for the K&N was worth it and they said not really.  (Although I'd have to admit the wrench-off feature would be nice).  I don't come close to putting 3K miles on this car between oil changes, so more than twice the cost for a super-duper filter may not be needed.  

Well....I'll throw my hat into the ring, and say this....
I use ONLY AC/Delco oil filters on my GM vehicles. The only time I would use anything else is on a new build, where the filter would be changed in just a few miles. That's it...no other reasoning.
I have seen many a Fram filter blow across the shop floor on cold startups back in the day. Don't know if they are any better now or not, but ain't gunna chance it.
Wix filters, imo, are not very good in the filtration department. Don't take much to clog them up, and I have seen some with few miles on them that the element has collapsed.

Since I can no longer buy the "correct" PF25 for my '74, I use the PF454...it is a little larger, but not much.

I figure I will chime in just because FRAM deserves it....Twice in the last year, I have purchased a Fram filter as part of a package oil change deal - one for my 07 Mustang and another for my Silverado pickup.  In both cases, I could not get the filter to tighten up (I only use my hands to put them on) and it would just spin. Neither one was properly crimped and they would have just blown off under pressure. In a case with a friends car, a Honda, he was using it at an autocross and blew a Fram filter.  Let's just say their quality is not properly reflected in their excellent marketing campaign.  I won't buy any more FRAMs and wont use them if they are part of some package deal. Just not worth the hassle and worry.  I have 3 Corvettes and only use AC or K&N filters on them.  On my Mustang I use Motorcraft or Purolator (which have had very good reviews).

I use the PF35 which is the taller version of the PF25 and was used on the pickup trucks.  Never cut one open to verify that the filter element is actually longer also.  Don't know if they're still available tho as I bought a bunch several years ago on sale. 

Didn't know the PF 25 was no longer available.  Checked the O'Reilly website and they still sell the PF 25.  The PF454 looks like a very short filter.  Not sure what GM is doing as both my Tahoes have filters about the size of soup cans. 

Edit: I see why you get the PF-454. OMG  The PF-25 and 35 are $28.  WTF


|UPDATED|9/17/2012 6:23:52 PM (AZT)|/UPDATED|

Yuse guys have me convinced - I'll switch out my Wix for the Delco PF454 next chance I get.  

I actually DO have an original, PF25, still in the original box, from the '70's....I paid $60 for it several years ago....

You can buy a PF 25 on Amazon for $15 if you spend $25 to get the free shipping.  Has anyone used the PF1218 filter. It looks to be a larger version of the PF454.

|UPDATED|9/20/2012 6:50:07 PM (AZT)|/UPDATED|

I am about to change the oil for the first time since I bought the car 3 months ago. The previous owner used Valvoline MaxLife 10w-40. This oil should be ok. I am thinking of adding some ZDDP suppliment. It is always nice to get some other people's thoughts on the topic. I am still new to the corvette. The car will not be driven very much, so it will only be getting an oil change once a year