I just drained it out of my Navara Turbodiesel this morning after 10,000km.
Save a litre mid stream to send away.
It appeared to hold up pretty good, not running out like water, and no chunks. Filter housing cleaned up really well.
Put Castrol formulaR 0W-40 (reputedly BP Visco 7000) back in it. Slightly lower visc @100, same HTHS, and a higher Sulfated Ash than the M1.
we'll see.