While for the oil this is true, however you do not assume this is always the case. Infact the fuel filters our truck came equipt from the factory will now void your warranty. They do not meet the new standards for fuel filtration. The OEM filter had to be revamped to now meet the requirments. The new OE filter is made by Fleetguard and is fine to use, but for a while the OE was not suffecient.

 

IIRC they discontinued the 10 microns jokes and put 7 microns into production. They are not great but better than freaking 10 microns. IMHO a common rail should have no less than 5 microns of filtration.

Link to new (2007) filter:
http://www.genosgarage.com/prodinfo....mber=FS19856_P