which oil for Ray Barton engine

Hi folks,

i just bought a new A-body toy. Has a 528" Ray Barton Hemi inside.
The pre owner used a straight valvoline W40 oil with ZDP for a better lubrication.

What oil do you prefer? Its a physical to find the right oil. I'm located in Germany and the most lubrications are different than the US ones.

ideas welcome...

thx JAN

Is it that Dart that was on EBAY? That one also has a Ray BArton 528 Hemi, with nitrous!