I think i have oil in my water. im about 1600 miles away from my truck but my woman drives it while im gone. she was checking the oil becase it started to leak pretty good. she noticed the over flow talk was realy dark and there was a very dark oil like substance at the bottom of the over flow..... the oil was about a quart low and black not milky what so ever. two things are strange to me first the suposed oil is in the "bottom" of the resivoir..... oil floats on water..... and the engine oil is just fine..... im gunna have her take it to my dad to get a better look im just freakin out i realy dont want to have to do a head gasket. so if anyone has heard of a similar issue let me know.