10W-30 or 5W-30
Please NOTE that since you left out the Year of your Car, and which engine you have your Capacities MAY be different.
I did check 1999 thru 2004 and as you see they were a bit different.
Here are a couple.
1999 Hyundai ELANTRA 2.0L 4-cyl Engine Code DOHC.
CAPACITIES
Engine, with filter..........4.2 quarts[1]
Cooling System, Initial Fill..........6.4 quarts
Automatic Transmission, Total Fill..........7.0 quarts
Manual Transmission, ..........4.6 pints
[1] After refill check oil level.
2004 HYUNDAI ELANTRA 2.0L 4-cyl Engine Code D DOHC
CAPACITIES
Engine, with filter..........4.1 quarts[1]
Cooling System, Initial Fill..........6.4 quarts
Automatic Transmission, Total Fill..........8.3 quarts
Manual Transmission, ..........4.6 pints
[1] After refill check oil level.
Good Luck and Remember.
Change Your Mind, Not Your Oil.
Use the First In Synthetic Motor Oil's.
The 2002 Hyundai Elantra runs on regular unleaded.
The 2007 Hyundai Elantra runs on regular unleaded.
The 2012 Hyundai Elantra runs on regular unleaded.
The 2008 Hyundai Elantra runs on regular unleaded.
The 2010 Hyundai Elantra runs on regular unleaded.
The 2014 Hyundai Elantra runs on regular unleaded.
The 2006 Hyundai Elantra runs on regular unleaded.
The 2013 Hyundai Elantra runs on regular unleaded.
The 2004 Hyundai Elantra runs on regular unleaded.
The 2001 Hyundai Elantra runs on regular unleaded.
The 2003 Hyundai Elantra runs on regular unleaded.
The 2011 Hyundai Elantra runs on regular unleaded.