When the pressure drop happened, I was using rottella 10 40? Not 100%. sure.

I switched to mobil synthetic, and it helped a little as far as raising oil pressure. (still not good, but just above 0 now.)

On a cold start, oil pressure will jump to 2-2.5 bar, once the engine warms up, back down to 0

thanks for the replies, I hope I can resolve this problem before it starts snowing!

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2