Just finished a dry compression test. Took pics of my plugs too. Engine and plugs were stone cold when I pulled the plugs. Plug #3 looked slightly darker than the other 5 plugs.
All plugs were out and my wonderful wife cranked the engine for 4 complete bumps of the gauge needle. Here are the compression numbers. Factory service manual says a 230ci should have 130# and I imagine the 250 would be the same.
Cylinder #1 - 125
Cylinder #2 - 125
Cylinder #3 - 110
Cylinder #4 - 125-130
Cylinder #5 - 125
Cylinder #6 - 120
