Just changed my oil on my 5.4l '97 Expedition. Been using Amsoil for 75k miles now (5w-30). I noticed that this last time the oil seemed like it was turning to sludge! Very black and thick, thought I even saw chunks! The oil itself had ~9-9500 miles on it. I changed the Amsoil filter @ ~7k miles, put on a Fram XG2 for the last 2K. I should've done an analysis, but instead I put in some Seafoam to clean it and changed the oil....
I've been a true Amsoil beleiver so far...
I've been a true Amsoil beleiver so far...


