Purolator calls out Fram with their cardboard end caps

[motorking]

Originally Posted by LTb1ow

Wait, why is there bowling balls in oil? Is that a new thing?

FRAM removes particles in the 10-20 micron size. WIX and Purolator test at 25 microns to get better marketing statistics
FROM GM

"Abrasive engine wear can be substantially reduced with an increase in filter SPE(MP). Compared to a 40 micron filter, engine wear was reduced by 50% with 30 micron filtration." (98% point) "Likewise, wear was reduced by 70% with 15 micron filtration." (SAE TPS 881825 p5 - David R. Staley, General Motors Corp. 1988)

[motorking]

Originally Posted by 97camaro

Why not use sintered metal for end caps?

because there is no need to. Honestly.

[sweetbmxrider]

Originally Posted by motorking

The end cap in a filter is only there to seal the ends of the filter media. A fiber end cap seals better than metal. Ever glue something to a smooth surface? The fiber end cap has a porous surface and provides a much better bond.