Oil filter internals

[aquariuscsm]

I stopped by Walmart on the way home from work last night. I opened the different brands just to see what the insides of different filters looked like. One major difference I saw was the inside of the Fram "classic orange". The tube/sleeve that lines the inside of the filter had very few holes in it,whereas all the others were full of holes,sort`ve a "honeycomb". The inside of the Fram was almost solid with very few holes. What exactly does all that traslate too?

As you can can see,I know absolutely nada about oil filters.

 

[ThirdeYe]

Not much, I believe there have been posts about how those holes don't really restrict anything. The E-Core (which is almost completely open in the center) compared to a Fram shouldn't be any less restrictive in terms of flow through the center tube. The media is much more restrictive than the center tube is, if I understand it correctly.

 

[labman]

Even with very few holes, likely the Fram tube contributes very little to the over all restriction of the filter. The last time this question came up, I tried pouring cold, used oil into a disassembled Purolator center tube. It ran out almost as fast as I could pour it in. Try it with the Fram.

Likely the other filter was a much better filter, but for reasons other than the center tube.

 

[postjeeprcr]

There are quite a few holes in the center tube of a Fram I have cut open