Tracy:
Over the years I've used a lot of different brand filters, including Fram, and never had a problem with any of them. When I bought a Porsche in 1990 I decided that I would stick with name brand filters given the volume of oil (12 quarts) being filtered and the different designs on the pressure relief valves. I found that the Porsche brand filters from the dealer were actually less expensive than Fram and used them exclusively. That engine now has 165,000 miles on it and is still solid and strong with no oil or oil filter related issues.
On the Mustang, I use Wix as it is conveniently available and not that much more expensive than the low cost/quality filters typically found at the chain stores. High quality oil and oil filters are cheap engine insurance in my book.