Did you change the oil after this? What did you do to solve the problem "new injectors"?So, the darkening and it being a little thin can be indicative of fuel in the oil even though it is not leaving a halo? I got the drops with it cold. Does the paper towel test show better with the truck/oil warmed up?
The history is that about 3 weeks ago I had enough fuel in the oil that it was dripping from the front pan seal when parked on a slight decline.