[j cAT]

""I checked fuel pressure and with the key turned on it went to 60psi but within 3-5 seconds it flat lined "" well if that means 60 psi then rapidly drops to zero that means unregulated fuel dumping into the engine with what you say on the other observations. my guess is the regulator/injector assy defective. runs ok above idle but not at idle too much fuel and oil being diluted creating your oil leak to increase much more .. as was mentioned these fail , common .