Curious  if  what  Dodge  recommends  and  what  Cummins  recommended is the same!

Bosch says   3 micron for the  cp3 pump in my  jeep..    Some swear that mopar  installed  10 microns  at the factory. 

I think it was 3 or 5. People were installing 2 micron filters between the stock housing and cp3. But the testing changed and now they are considered 3 micron filters

When I spoke with Bosch they said 5um absolute single pass in the minimum spec.

A Baldwin PF7977 meets that spec, and some additional filters will exceed it.

Dodge did install 10um filters in 03-05ish, but due to excessive warranty claims they dropped to 7um circa MY06. It's better, but not enough. The same engine with non-Dodge filters got 5um filtration.

3um is right for OEM, in my research I haven't found an engine that calls for it. I'm not saying they don't exist, just thst I haven't seen it.

A quick search shows the Donaldon cross is 5um at 95%. I have yet to see a Donaldson filter be worse than the pure part, unlike NAPA/Wix. The Wix filter is 10um nominal.