The Navy and over-the-road truckers also use Frantz - keeps the wear down on those expensive diesels. I also had one on my 1963 Super Lark. That was a Super Stock class leader, and also used on the street. It was called the "Street Streaker" and spent many a night on Van Nuys Blvd in the Dan Fernando Valley. Embarrassed all the muscle cars, 406, 406, 427, and Hemi's. Studebakers still take home 75% of class records at the Pure Stock Nationals every year in Ohio - look it up.
Saw your blog on Frantz. I bought one in 1966 to put on my 1963 Avanti with had 14,000 miles. I changed the Frantz every 2000 miles and my full flow every 30,000 to 40,000. The Frantz kept the oil as clear as new, and oil was sent in to a lab by the Frantz Distributor every 10,000 miles. The test always came back as specs as new. Frantz has never had media migration - if you look at the unit you will see why. If that happened they would not still be in business. So they have been peddling these filters since 1955 - over 62 years. You do not want to use perfumed toilet paper - just double ply. As far as getting gaps in the toilet paper - that only happens under 1 condition - if you have excessive water in your oil. That is a warning to look for that condition. The top of the toilet paper would also give you other warnings such as excessive fuel in the oil or excessive engine wear. (silver and gold particles at top of filter). Off-roaders love them as it keeps all that dust of the oil.