Frantz Oil Filter
 

my 1975 911S Project has one mounted in the trunk, anyone else have one of these?

John

If that's the type that uses a roll of toilet paper, it might be the reason your car is a project. They filter oil about as well as an oil filter will wipe your butt.

Where do you get your information? TP filters do work, but they are by and largely bypassed due to the extreme pressure required to push oil through the TP. Only a fraction gets filtered.

Actually, I could see having one in series with the standard filter. But, then again, there is no substitute for changing oil every 3000 miles.

I don't think you meant to say you would put it in series. I have a bypass filter on my truck, and that type of setup might be good. It filters a quarter of the oil the full flow filter does and by passes the rest until next time around. You're right, I don't think I'd want a TP filter because of the small amount of oil passing through it.

I said it has it in the trunk, but it isn't hooked up. I may have mothballed the project for a few years, but glad I did, now I have a vision of what I want the car to be

Zeke,
I got this information from years of experience as a mechanic. While you are absolutely correct that it can filter effectively, toilet paper is not subjected to any sort engineering analysis for this purpose. I have seen an incidence where a roll broke up in the canister and shreds of tp clogged some oil passages and destroyed an engine. I don't think it's worth using a Porsche or any other car (with a few notable exceptions) as a guinea pig to determine which brands might work reliably and which will ruin your engine. Therefore I stand by my advice; use toilet paper and oil filters for their intended purposes.

regards,
Phil

I bet its very good for filtering vegetable oil for a diesel, glad it isnt hooked up in my car