The dealer I bought from a Chevy, GMC, Buick dealer offers a lifetime power train warranty on all their used vehicles. Built somewhere in the price I am sure or they expect most to come to them for service though not required. But I got the truck for a good deal compared to everywhere else. I hate not doing my own work but if there is an issue down the road not a huge deal. So a few oil changes and the fact that scheduled maintenance is 60k, 90k, and 110k I think it is not a huge cost. I can buy oil and a filter for $30 so I am spending about 20 more an oil change but they rotate the tires too which is well worth the $20 alone with 33” E load tires. As for oil I too am sure Motorcraft is someone else’s oils but at $18 a 5 quart jug it gets the job done at a great price. I change oil at 5k there is absolutely no reason to run full synthetic. I do in my Tototas because they claim it is required.