First UAO on my 2.7 truck. Haven't really had any issues with it. Lots of highway miles, and recently have started more in city driving. This was about 5k miles on the oil I wanted to switch out to a SN+ formula from now on as this fill was only SN. I cannot for the life of me remember if I used Castrol GTX 5w-30 or Havoline 5w-30 full synthetic. Looks ok to me other than maybe higher iron? Not sure why they labeled it as a diesel and got the mileage messed up.