ECP oil

[Backhill1]

[QUOTE=skyship007;2078811]How long the oil bypass valve opens depends on a lot of different factors, but in most cases it's only a few seconds IF the oil is of the correct type. It makes very little difference in engine wear terms unless the oil is too cold to flow around the top end. Just to confuse matters most TD oil filters are in partial bypass all the time at high revs. So the time quoted depends on how you define open.

No normal full flow filter works well when clean, that's why they introduced dual units with an ultra fine secondary. If you ask on Bobs The Oil Guy forum they should have some wear particle rate graphs showing just how bad the first 1000 miles is with a new air or oil filter, although it does depend on if you pre fill a new oil filter. If you do prefill a new oil filter, then the initial efficiency is much better and often turns out to be similar to the efficiency of a dirty filter. Alas it's not possible to prefill a side on spin on oil filter.

I have tested numerous engines in endurance testing and field testing with live particle counters on the system post filter and I can assure you that there is no improvement with a dirty or older filter.
I'm not sure where your information comes from but it is contrary to all engine trials and field data I have been involved in.

I'm interested in how this data been collected we use an ISO particle counter and take live samples at 25hr intervals and send to our own Lab. How has this data been collected to prove a dirty filter improves things?

NOTE by a live sample our recommended sample point is fitted on the main outlet from the filters before the main gallery.