Dimitri over at http://www.tdiclub.com has had some outstanding UOA mixing 150 ml (half a can) of Lubro-Moly MoS2 with 4.0-4.5 quarts of Mobil 1 Turbo Diesel Truck.
I tried it myself on two occasions, and I thought the results were pretty good. But seeing that others have done the same and also got terrific results, that is confirmation in my book.
So instead of trying to find an oil better than TDT, with moly, just get the TDT and add your own moly.
He determined it via 4-ball testing three years ago. The 5W-40 was the TDT variety. There was a vast difference in boundary lubrication between the two. In fact, testing a rather eclectic collection of 14 oils, the 5W-40 TDT had the worst wear scar by far, even when compared with the lowly mineral oils.
Another interesting tidbit from his testing was that Exxon Superflo 5W-30 and 10W-30 also have moly in it.
Thanks for clarifying, Kestas.
It confirms what Amsoil's 4-ball wear chart says. Around 2002, most likely when the CI-4 version came out, Delvac 1's wear scars became pretty bad, > 0.60 mm. Older data from 2000 show a scar diameter in the low 0.40 mm range, slightly above that of Amsoil's own products. This was likely from the CH-4 version.
Again, we all know that 4-ball testing does not tell us a whole lot about an engine oil. The 4-ball wear test is just one among other test indicating "nothing". From Amsoil's mc oil comparison, I remember a good 4-ball performer showing bad results in the FZG test, while another lube with a large wear scar reached a high stage in the FZG test.
Whether these tests are relevant or not, I love to review them!