I'm sure the pan helps the intake charge, like my cars they have the air gap under the intake runners so the heat doesn't hit the runner heating up the charge,I guess thats why the old Buick 455's had that intake belly tray.
My thinking is how can a pan/tray cause 4 quarts to burn out, it would have to smell bad I know it has hot oil splashing against it,maybe 300degrees max? But when I tear mine down it doesn't have any burnt oil residue running 8psi for 4 years,or when it was stock..... I know the 575sc is cooking the intake charge because of no innercooler, I assume Merc tuned it safe/fat for that fact.IC has to be high when running for long time in boost!!
maybe the pvc is stuck open,running boost and pushing the oil mist,splash thru the PVC into the throttle body?
Anybody with experience/suggestions please chime in.
Id like to learn more as to why.