imho, if you can afford it, yes it is. syn oils are better at surviving extreme conditions, can improve economy and extend change intervals. i run syn in all my motorcycles and other small engines, but it get's pricy to run in my piece of junk car. but with a newer Honda you can't go wrong
Yes, you can with no problem. Virtualy all oils, synthetic & conventional, are interchangeable.
Yes, you can use synthetic, conventional, or a mix of the two.
The 2003 Honda Accord runs on regular unleaded.
The 2012 Honda Accord runs on regular unleaded.
The 2009 Honda Accord runs on regular unleaded.
The 2004 Honda Accord runs on regular unleaded.
The 2014 Honda Accord runs on regular unleaded.
The 2005 Honda Accord runs on regular unleaded.
The 2010 Honda Accord runs on regular unleaded.
The 2002 Honda Accord runs on regular unleaded.
The 2006 Honda Accord runs on regular unleaded.
The 2011 Honda Accord runs on regular unleaded.