I'm looking for anyone who has done any oil samples on a '04. 5-'07 5. 9 while using a smarty. I lost track of the number of miles on my oil and when i finally noticed I had 5500 on it (smarty on 3 while towing and 3 or 9 when not). Towing was about 20% of that. When I changed the oil it seems like it smelled worse than normal and looked like it had WAY more soot than normal. I typically try to change it at about 4500 miles but hadn't run #9 quite as frequently as I had this time. To complicate matters the last change i used Rotella where I typically use Valvoline premium blue. The time I tried Lubriguard (Warren Oil).
Any hard data welcome on the subject. I'm concerned I went longer than I should and might want to change out even before 4500. I probably should have done a sample since I was concerned, but just didn't have a kit handy.
TIA!
Any hard data welcome on the subject. I'm concerned I went longer than I should and might want to change out even before 4500. I probably should have done a sample since I was concerned, but just didn't have a kit handy.
TIA!