Originally Posted by poiu
I'm not writing as an expert in this area either, but I don't think that is correct. I have read and heard contrary information multiple times. I don't know if this article linked below from Yachting Monthly is better informed than your guy. Here he says that because of greater tolerances in the parts
direct injection engines have to protect from particles of 6-7 microns, whereas common rail have to protect down to below 2-3 microns. Reading that it looks like my 10 mu filter isn't really good enough even for an old engine
Reasons to be paranoid about Diesel
The little bit of information I was able to dredge up in a few minutes googling seems to support your position on this.
See, e.g. https://www.chevron.com/-/media/chev...ech-review.pdf
"However, as engine
designs to reduce emissions result in higher fuel
rail and injector pressures, the tighter clearances will have less tolerance for solids and impurities in the fuel
. Consequently, some engine manufacturers are now specifying filters with pore size as low as two microns."
I'd like to know the truth of the matter, and I started a thread asking for people's real experiences.