It's irrational.
So you buy an oil filter.
They hand you a box, filter element, a drain gizmo, and a couple of "O" rings.
The next guy with a spin-on filter application gets the whole enchilada - a can, ADB and bypass valves, springs, plates, gaskets, non-slip paint, etc., etc.
But your bill is double what the other guy pays?!?
So you buy an oil filter.
They hand you a box, filter element, a drain gizmo, and a couple of "O" rings.
The next guy with a spin-on filter application gets the whole enchilada - a can, ADB and bypass valves, springs, plates, gaskets, non-slip paint, etc., etc.
But your bill is double what the other guy pays?!?