You got to watch dealers like a hawk.
Years ago my first brand new car was a 82 Caprice. Nice car, sold it to my parents a few years later. Found trucks were a better fit for me. After a lengthy road trip, had the oil changed at the dealer where I bought the car, when I got back home. That chevy dealer screwed up the oil change and blew the valve cover gaskets after a trip to Maine for a funeral for my grandmother. They over filed the crankcase and it started leaking all over both sides of the engine. Took them 3 tries under the warranty to fix it.
Never trusted dealers since then, and that was 40 years ago. Nothing really changed with dealers since. They BS you about anything to make a sale. The service will usually suck because of the inexperienced low quality mechanics and sometimes aftermarket parts that the independently owned dealerships use to save a buck.
One thing I learned, cars will run until the warranties expire then you better be ready to replace them or learn how to fix them. Manufactures know exactly how long any part will last, and they don't build any part to last outside the warranty. 3 YRS or 36,000 miles. Why? they want you back to buy another super duper awesome best truck / car ever made. We live in a disposable society.
40 years ago they bragged about 21 MPG. New technologies that incorporate radial tires, aerodynamic shapes etc. My new Ram don't even get that with the aid of computers, thin sheet metal and plastics.