This thread hits a nerve because I had a similar issue. It really bugs me that the owner's manual CLEARLY says that ACEA-A5 oil (a full synthetic) is to be used in the car, and only if it's not available can lesser oil be used. I was shocked when the filled it with conventional oil, and never offered to use synthetic at a price.
I wrote to Genesis corporate and they wrote back saying yes, the recommended oil for the car is synthetic, but that oil change issue was between me and the dealer - even suggested that if I pressed them hard enough, I may be able to coerce them. BS!
I only go into the dealership to get the free services and filters. Now, if I need to go in and also want an oil change, I bring my own synthetic oil - but who knows if they use it (tech may put it into his car trunk and take it home for all I know). I change my own oil now at home, myself (always have for 45 years before this car).
Last time I took it in, I listed 5-6 things I wanted done - change oil/filter with my oil, check alignment, change cabin filter, change engine air filters, tighten up loose rear view mirror. I read this off to the service lady and she keyed it into my order. I called again later to clarify something, and all my notes were gone, so we (same lady) went through it again! Each call she coughed loudly into the phone several times and called me "hon" (short for honey) several times.
When I got to the service department, the advisor came out and asked "okay, what are you here for?" ... I was like, "are you kidding?" So we went through the list for the THIRD time. I said "oh, well the service department is on the Hyundai side of the computer system, your notes are on the Genesis side - the don't come over". I could not believe it.
So later that day I go to pick up the car and they try to charge me over $100 for the oil change. I said "nope - all this is covered under the free, 3-year Genesis maintenance" - the cashier said in a rude tone "well, you owe me $1xx dollars - otherwise, you need to get your service advisor to take it off the order", then seemed to look past me to get the next person in line. Could not believe it.
So, off I go to the shop to find the guy who wrote me up. He was about to leave, glad I caught him. I said yeah, I can take that off, bla bla" - he did, and I got my car our without paying.
Oh - the rear view mirror is still just as loose, even though they said it was fixed.
I will not go there for service unless I have to. I pray I never have a serious problem with my car!