Recommended interval for oil change according to owner's manual; has 2 scheduled intervals: 1) for normal driving conditions - every 7,500 mi & 2) for severe driving conditions - every 3,000 mi, although Hyundai will let you go up to 3,750 mi.
Qualifications for severe driving conditions:
1) repeated driving of short distances of 5 mi or less in normal temperatures or less than 10 mi is freezing temperatures
2) extensive engine idling or low speed driving for long distances
3) driving on rough, dusty, muddy, unpaved, graveled or salt-spread roads
4) driving in areas using salt or other corrosive materials or in very cold weather
5) driving in sandy areas
6) driving in heavy traffic area over 90 degrees fareinheit
7) driving on uphill, downhill, or mountain road
8) towing a trailer, using a camper, or roof rack
9) driving as a patrol car, taxi, or other commercial use
10) driving over 106mph
11) frequently driving in stop & go conditions
This means severe driving conditions include in town driving, dirt road driving, up-north salt road driving, coastal beach area driving, hot southern or south western driving, mountainous driving, taking trips w/excessive luggage or something in tow, commercial driving/delivering, high speed +100mph driving.
I italicized the above to show you this qualifies 99% of us in one way or another to have our Hyundai's oil changed every 3,750 at most. Unless you are using synthetic oil, which the car does not original come with. If you switch to synthetic, then 7,500 mi intervals should be no problem. If you can not show that you have your oil changed during the correct intervals & engine sludging occurs with your vehicle, Hyundai will not warranty your engine. So, take my advice & change your oil no more than every 4,000 miles.
This is quoted directly from your owners manual on pg 7-11 under severe driving conditions.
How do I know this & why am I advising you? Because I'm a service advisor for a Hyundai dealership & have been for over 10yrs. I'm well versed in Hyundai's warranty & have seen many claims declined due to this exact problem (engine sludging). Engine sludging occurs one way, engine oil break down & that usually occurs from not doing your oil changes close enough together.
I don't want to see any of you have problems with your car or your warranty. You spent alot of money on the initial purchase of a really nice vehicle, take care of it & do the oil changes at regular intervals. They are not really all that expensive when viewed in the grand scheme of things.