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or mopil xhp that's very good the 2003 kia optima uses 5w-30
5-20
The 2002 Kia Optima runs on regular unleaded.
The 2008 Kia Optima runs on regular unleaded.
The 2006 Kia Optima runs on regular unleaded.
The 2003 Kia Optima runs on regular unleaded.
The 2007 Kia Optima runs on regular unleaded.
The 2010 Kia Optima runs on regular unleaded.
The 2001 Kia Optima runs on regular unleaded.
The 2005 Kia Optima runs on regular unleaded.
The 2014 Kia Optima runs on regular unleaded.
The 2009 Kia Optima runs on regular unleaded.