I recently switch from Mobile 1 to Kendall GT-1 full synthetic. I had been using the Mobile 1 for the past 50,000 miles on my Sequoia since new. Dealer here in Hawaii wanted almost $250 for a Mobile 1 oil change and tire rotation. Was able to get the Kendall GT-1 full synthetic oil change for $62.00 at Firestone. I did some research on the GT-1 with little results other than it is owned by Conoco and is the same as Motor Craft Synthetic. I am on a 5k OCI per the owners manual. Does anyone have any experience/comments with using the Kendall GT-1 full synthetic oil?