I'd run with the Rotella petroleum oil for the first 5000
miles before switching to synthetic.  It seems that proper
engine brake in is slowed or not attained with synthetic
oil.
-Dana-

karl wrote:
>
> From: "karl" <thewestyman@mindspring.com>
>
> What is the general concensus regarding the initial oil change? The engine
> in question is a new (not rebuilt) 1.9 turbodiesel. It now has Rotella dino
> oil, and has less than 100 miles. At the end of tomorrow, it will have 500
> miles, and I will have a place to change the oil, on my way to BBTA. The
> question is whether it is too soon to change it to Delvac (Mobil) 1
> synthetic, or should it run a while longer on Dino? Thanks for your input.
>
> Karl