Originally Posted by BXT

Correct....overly rich can wash the bores of lubricating oil....at worst it can score the bores and damage the rings......But I don't think "too rich" is the issue here.

Are you running an aftermarket BOV Jes?

Personally whether its a 06/07 Rex or Foz, I wouldn't be running around for too long with a pod & TBE without a tune otherwise it can get very expensive