In U.S. measure, (we really should change to match the rest of the world at
some point), that's about 1 qt. per 1500 miles. That sounds reasonably
normal to me, but it's definitely on the higher end of what I consider
normal. If you're not seeing any smoke, I'd just keep the oil level full
and keep driving. Even at 50 percent more consumption than you have now,
even though you're leaving what I consider the normal range (my personal
range, not Hyundai's), it's probably still not practical to attempt repair
over simply keeping the oil full.