Last weekend, Marty came down to my home and we installed my new single shot injectors from DIY, new turbo, and new modded hpop. I called Jim at Rosewood Diesel and talked with him about my bio and my cores. While on the phone, he asked me to look at 1 of my stock injectors and tell him how the exterior finish looked between the bottom orings. I told him it was a shiny stainless look, not dull and etched. That was good he said. I asked him to get back to me and tell me what he found once he tore into my injectors. I was curious(along with him) how the internal would look after 7-8k miles of my home brew bio running 100%. This is what he sent me in an email:
Your cores appear to be in great shape. Slight aroma in the fuel end, but not the nasty bio smell I usually find.
Otherwise they look like a normal AD set.
Hope the Single Shots are working out for you.
Rosewood Diesel Shop
That makes me feel pretty good about the quality of my bio.