Different brand, but still has injectors....I pre-mixed the first tank on my 05 Doo 600 SDI, (and followed the break-in procedure in the owner's manual) and 7000+ miles later, the compression is still holding in the high 140's and I've had no engine troubles whatsoever (knock on wood). Most of the gurus on DooTalk recommend doing a top end job at 3000-4000 miles, but personally, I can't see fixing it if it ain't broke.
I would have to agree that the factory puts it there for a reason. And no offense to the good dealers out there, but....not all dealers are created equally as knowledgeable!