I am adding a MANN Preline Filter system in mine. It's being placed before the factory filter. 1 micron is too small in my opinion. I think factory is around 5+/- Micron (not really sure since MANN and others do not post microns for filters). Preline is around 10 micron which is good for a pre-filter. There are different micron filters and functions but it also removes water. OEM removes water too but not as easily as the preline filters do.
100K miles on a 1 micron filter is not a good idea neither is 50K miles. The filter for me is only in-case I fill up at a regular gas station. Normally I fill up at stations that have 20-30micron filters on their fuel pumps. I have a card with Pacific Pride network, they filter all their diesel fuel.
I went with MANN because they are OEM. It has a multigrade filter and it well made. I have not got it in yet from Germany but should be in in a week or so.
Again my main reason to add this is it only takes 1 table spoon of debris to clog a filter and although I have never had anything in my fuel filter canister, I am not taking a chance on it with a regular gas station who may not or typically does not take care of their tanks or pumps. I think a 1 micron for a main is not a good idea. It might be ok for after filter from the main OEM filter but even then 1 micron will clog quickly. lowest I would go for an after filter from MAIN is 5 microns.
Thank you for your opinion, but I respectfully disagree, especially since you don't know what filter I am talking about and it's filter capabilities.
IMHO you can get small enough for a main filter ( i could quote a bunch of different sources for my reasoning, but this one sums its up, as does the paper in this link)
"fuel system performance.
It must be extremely precise in terms of quantity, distribution and timing. Ball seat valves are sealed with balls that are only 1mm in diameter. A good seal is absolutely necessary for proper injection. Damage from erosive wear, such as shown below, will cause over fueling, leading to decreased fuel efficiency and eventually shut you down altogether.
hpcr injector damaged by hard particulate(3) high-pressure-fuel-system-wear
Pump performance can also be compromised by scoring and abrasive wear. These issues are magnified by the tighter tolerances and extreme pressures in HPCR engines. In these circumstances, it is the smallest particles (1-5 microns in size)
that cause the most damage, virtually sand blasting part surfaces."
Seeing how many many Duramax (including myself), Cummins, and even Powerstroke people have been running this same filter or the slightly smaller 2 micron Cat filter on their trucks for years and some going by the recommended 100,000 mile change interval I don't see where your reasoning comes in.
The fuel injectors are typically have clearance tolerances in the 1 micron level, so obviously it wouldn't take much to start abrading the ball seat in the injectors, not to mention how teeny tiny the injector orifices are again it would take much to clog one up