Are you going to do the first oil change yourself, or have your Hyundai Dealer do it? (or worse, a "Quick Lube" type place do it).
I think the V6 takes the same amount as the V8, about six and a half quarts. Check your owners manual for the exact amount.
I would advise against you doing the first one yourself. It would be best to have the dealer do the first one, (AND YOU WATCH - insist on them allowing you to watch, or take it to another dealer where you can watch, even from the door). I want you to watch, so you will see just what is involved in changing the filter, removing the bottom "skid plate", etc.
If you DO decide to do the first one yourself, you can only buy the oil filter from Hyundai dealers, as auto supply stores do not have this filter in stock yet. NOTE; if you buy a filter from your local Hyundai dealer, they may make an error and give you the wrong filter, as the Genesis filter is smaller than other Hyundai Drop In Filters. Its happened before to forum members.
Lastly, if you do it yourself, DOCUMENT, DOCUMENT, DOCUMENT!
1. Keep recepts for the CORRECT oil you purchased. (see below)
2. Keep recepts for the CORRECT filter you purchased.
3. Document the date and milage you did the change yourself.
I've gone so far as to cut the labels from the plastic bottles, washed them, and kept them for documentation that I used the correct oil.
Yes, many dealers have synthetic in stock, in bottles, however it costs you an arm/leg to use their synthetic, plus I normally use a different brand than what the dealer stocks.
In my case, I purchase my own FULL SYNTHETIC oil, and I have my dealer do the job. I pay them for the Hyundai filter and their labor. The last time, my dealer had a special of $17.95 for a regular oil change. He only charged me less than $14.00 and when I told him that it was not enough for the work the technician did and wanted to give them at least $18 to $20, they would not take the money. Great Dealer. OK, I paid $14.00 and I stuck a $5.00 in the Techs pocket (big spender from the east).
Good Luck,