While you guys are working out the extension details, I'll add another oil analysis. .
This one is with "All New Stuff". That is fresh Delo 400, oem & frantz filters run about 5300 miles with the needle valve inline and slowed down oil flow through the frantz. No make up oil, no filter maintenance.
2 lessons learned. One is the slowed down flow definitely kept the oil visibly cleaner past 3000 miles as is shown in the Gulf Coast link just below. The other lesson is at 5300 miles, the frantz element is restricted to the point to where when I went to open my sample valve/spigot, there was almost NO flow through the frantz!! I needed to open the needle valve about 1/8 turn to get some flow moving again. With that in mind, the attached oil analysis is probably tainted a bit due to just re-activating a very low flowing and full TP element and probably released some particles into the sample since the oil was visibly black as compared to 2000 miles earlier when it was still "nicely" transparent.
The link to pics before when the frantz was still flowing:
https://www.turbodieselregister.com...f-coast-bypass-filter-guts-3.html#post1882247
From now on, I'll be changing the frantz element at about 2500-3k mile intervals, and keeping flow to a minimum (significantly less than with just a 1/16 restriction orifice inline).
Below is the sample taken just after opening the needle valve to restore some flow through the frantz at 5300 miles. IMO all is good, except still a little concerned about the elevated silicone level. I had previously summized it was due to several injector change-outs and used some silicone on the air horn bolts, this sample is with all new oil. The only other thing that had changed was I went to the nanofiber 4510 installed BHAF style. I still doubt that it's letting dirt through due to no unusual wear metals showing. Since the sample, I have changed to Amsoil 15/40 HD synthetic oil and an Amsoil nanofiber drop-in air filter utilizing a well-sealed stock airbox with oem snorkel and PSM cowl hole addition (which is working out well so far).
Here's a link to a higher res pic of the sample below:
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