Is there a list somewhere of which versions of oracle are supported for DLP 11.6 and 12.0? I am specifically wondering if 11.2.0.4.1 will run both versions.
You can find Compatibility Guide
11.2.0.4 is not currently supported by either 11.x or 12.x. It is roadmapped for a future version. The currently supported version for both DLP 11.6 and DLP 12.0 is Oracle 11.2.0.3.