Congratulations on the new Telluride. I've had mine for about 8 months. I did my first oil change at 1,500 miles, my second one at 5,000 and plan to do it every 5,000. I had the dealer turn on the functionality that allows me to track my service at my own intervals instead of the pre-set 8,000 miles settings.
I do my own detailing and use the Griot's Garage products. I stripped it when new using their Foaming Surface Prep which removes any waxes from dealer car washes, buffed out all of the paint using their Complete Polish and then used their ceramic wax which is still holding up strong. I wash it at home using a pressure washer and dry it with a leaf blower. No scratches yet!
For accessories, it came with the cargo cover. I bought from Kia the carpeted floor mats, the carpeted cargo mat that covers the third row seatbacks, and the bumper protector - which looks great. I also bought a couple of cargo nets and a leather covered storage box for in-between the 2nd row captains chairs. I also bought a Carlinkit for wireless Apple CarPlay. No regrets on any of these. I hate the "autostart" and bought the device that permanently turns it off.
