Well it's official.... It's a Mechanical issue

Ellis Groo @ Speed Secrets picked up my car last Friday (and used quite a nice trailer for it!) to start investigating my Engine Problems.

Obviously started at step one was to see what the different gauge readings are:

According to a scan tool, once warmed up we saw:
6 PSI @ Idle
35 PSI when revving (don' t know the exact RPM's but doesn't really matter)

Once he was able to get a mechanical gauge hooked-up we saw:
6-8 PSI @ Idle
40 PSI when revving


That means officially it's no longer just a glitchy wiring harness or something, but something is seriously wrong inside my engine. Ellis will be pulling the pan and front cover here soon (and cut open the oil filter, but I doubt anything is in there since the dealership changed that the first time it happened). I'm keeping my fingers crossed for something 'easy & stupid' like a stuck-open relief valve in the pan or so...

All in All pretty depressing news so far :(