So the other day I decided to run a compression test on my 5.9 magnum. Haven't done one since I put the engine together a couple years ago, so just decided to check it out. Numbers look pretty even across the board, all between 139 and 144. Plugs look kinda of black and sooty probably because the choke was on most of the time when I was warming it up before the test. (im guessing). But I know it's probably running a bit rich too. So most of the plugs are black or brown, but wondering whats up with #8 ? Looks bright white compared to the others. Any Idea why that one looks so lean?