[oil pan 4]

Now I remember why I don't care for them.

People who build and tear down engine who have used total seal rings claim that all the 2 ring halves on the total seal ring eventually line up and stay that way and that this is very common.
People who have used them called them a waste of money.
Engine builders advise people not to use them on daily drivers.
Some people complain about excessive oil consumption with them on daily driven cars.
Almost all racers that have used them end up going back to traditional moly plasma coated file fit rings after being unimpressed.
The rings are thin and very fragile compared to normal rings, because they are cramming 2 rings into the space of one.
This type of piston ring was originally invented for hydraulic cylinders and for use in air compressors. And that is where they should stay.
The people who swear by them sound exactly like the HHO believer cult.

You can get file fit for the same cost as regular rings most of the time.
All you have to do is fit them to the minimum recommended gap in the narrowest part of each cylinder.

Next engine I build will use speedpro molybdenum plasma coated top rings fitted to the minimum gap spec. A cast iron second and standard tension oil ring (because it will be a gasoline motor).
Almost exactly like I did with the diesel.