When I changed my oil for our trip to Kansas a week ago I used Mobil Delvac. My truck seems to idle a lot smoother and according to my wife is quieter. Are we imagining this or is there something more to it? I have used Rotella T religiously since I bought the truck (2nd owner) in 99'. If I had to give a reason for the switch, all I can give is a blank look. Maybe it was the cool black container with the built in spout. Anyways, I know everyone has there preferences but I was curious to see what others thought.
See ya',
Craig
See ya',
Craig