Detroit DD13 Addng Gear Oil

[bossboy2]

(03-14-2018 )uncleal13 Wrote:  How did you get the soot down to zero? That’s awfully clean.

uncleal, I don't know. I spoke with Eric at the Caterpillar oil lab. He said they use a different method than they did in the past and that any reading below a certain threshold shows up as zero. He also said that the DD series engines for some reason have been incredibly clean in the soot category. Even with my Speedco samples I was only getting a 0.7 and a 0.6. That said, I know Detroit uses a centrifuge to filter the engine block vapors so that may be the reason. It makes me re-think whether or not I want to install a bypass filter. Posting a couple of pix of the centrifuge.