The 2003 Hyundai Elantra runs on regular unleaded.
R-134
Automatic - Hyundai SP3/SP4 Manual - SAE 75W/90
probably r134a, but check with your manual.
The 2001 Hyundai Elantra runs on regular unleaded.
The 2011 Hyundai Elantra runs on regular unleaded.
The 2005 Hyundai Elantra runs on regular unleaded.
The 2013 Hyundai Elantra runs on regular unleaded.
The 2014 Hyundai Elantra runs on regular unleaded.
The 2008 Hyundai Elantra runs on regular unleaded.
The 2010 Hyundai Elantra runs on regular unleaded.
The 2006 Hyundai Elantra runs on regular unleaded.