I'll throw in my $0.02, which is actually just regurgitation from sites such as bobistheoilguy and thedieselstop.
I hear the HEUI systems (DT466e, T444e, some Cats) don't want anything but dino oil. It seems a good chunk of the HEUI driving population also advises against additives such as Lucas. This is mostly derived from anecdotal evidence, but it seems to be the direction people have taken.
I used Rotella T conventional last change and am happy with it.. I mean, the engine hasn't blown up.. runs as I would expect.. it was on sale
International's recommended oil change interval for the T444e is 10000 miles (16000 kms) or 350 hours, btw. I did the last oil change in the spring of 2014, but hardly drove the bus. I'll change out the oil next spring. I won't be at 16000kms, but I'll drain it due to age.