oil filters

After reading several articles on filters I'm not a fan of Fram either but to answer the question posed by Rani I believe only the filter media itself makes a difference on how much "grit" it catches. But taller filters have the advantage of not just holding more oil but more capacity to hold more grit. If it's an old engine that burns oil that can be an advantage.

I haven't seen proof of this but I'd also think a taller filter would most likely have less restrictive flow because it has more outlet holes (not the holes on the bottom of the plate, the holes down inside the inner tube. The amount and size of the holes can vary by filter brand too.