I DID NOT post the use of USED MOTOR oil. I said NEW motor oil.
I definitely need to start using more oil in my fuel. Just took two engines worth of rotella to the recycler last weekend....
Never ever never put crankcase oil from a DIESEL engine into a diesel fuel tank. Even with a centrifuge and 87 ways to make it good you will still be wiping out the hand lapped surfaces of the rotating plunger in the HH. One CAN NOT get the diesel soot byproduct of combustion out of diesel crankcase oil, not in a "normal" set-up anyway. Oh, the HH will last a long time, maybe. Anybody find a new original US government GI type hydraulic Head lately?
All the test benches went away years and years ago.