Quote Originally Posted by isuzurover View Post
Commonrail diesels have much higher specifications for fuel filtration and also much higher fuel flow (recirculation) than do old-tech diesels. That said, most filters do not meet the specs when tested in real-world conditions. Most of the old-tech (e.g. CAV type) filters and sedimenters are either not large enough or not fine enough for edcommonrail engines. However that said - if they are sized correctly they can work well as a pre-filter to protect the $$$ main filter.
Ben, do you thing a Lucas sedimenter would have sufficient fuel flow. Or is adding something like this unnecessary. After my substitution with a Racor filter/sedimenter I'm more inclined to stick with the OEM setup.