The 3.8 bar is a warm value. After some searching on this site I found an item on tweaking the warmup regulator. I tapped the external pin down while the engine was cold to lower control pressure from 2.3 to a little below 2, wires off. So now everything I can measure is within specs, and I'll see if theres a difference tomorrow morning.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma