Amsoil has been around forever and if a fairy big player in many power sports.
Their filters are some of the very best single stages available, and they have great high TBN synthetic oil.
The availability of high end synthetics at wal mart has blunted their edge somewhat but the product quality is first rate.
Their bypass kit requires plumbing but is a mainstay in small commercial rental fleets.
The stacked disk method has real holding capacity as good as a small external but of course not as good as a large external vs the PTFE disk type (microgreen) has very limited capacity and saturates quickly compared to the others, but then again we know autos don't throw out as much crud as diesels.
MG claim you can get 30K of life from a sump over 3 filter changes using this PTFE disk and a synthetic base stage.
An interesting round and round here on BITOG is is the bypasses main benefit is one of enhancing engine life or greatly enhancing OCI, or potentially elimination them altogether in some instances. Or a complete waste of time? The discussion is lively and fun.
If I could run a statapour on my car I would, as it is I flip flop between micro greens and Ultras on my autos, and Wix racing or morose's on the boat engines.
When you say you can't get (or bet I can't) a bandolier magnet for your car, Im not sure what you mean because they are sold by filter diameter vs a specified auto, but for sure there are application they don't work.
I run magnets everywhere because I worry more about what does happen (small particles go round and round without being stopped and accumulate over time ) than what "could theoretically happen" under some set of circumstances I've never encountered in my applications.
My latest toy...Just finished tuning so the finish work gets done next. Interior panels etc.
What car do you have ducked?
UD