I found this on another forum and it alarmed me about filter selection.
Basically the EVO oil filter is 30 microns in filter media and the Twin cam is now 5 micron. The oil jets that cool the bottom of the pistons in a twin cam engine need the 5 micron rating otherwise they will not be able to function once they get clogged and the pistons will heat up more than they should.
I have an EVO and Twin Cam, just did a service on both and used the Twin Cam filter on EVO and TC.
Should have used a 30micron filter on the EVO, only did about 60klms since oil change...what damage if any would be done running the 5micron over the 30micron filter?
