2011 Honda Civic Q&A
2011 Honda Civic Question: Is it bad to change my car's gas from unleaded to supreme?
Supreme gas sold in this country is also unleaded. See what octane rating is suggested by Honda should be in your owner's handbook. Check here http://repairpal.com/automobile-owners-manuals-online or try this link you may be able to down load a free copy of the owner's manual for your vehicle http://www.autousermanual.com/ - patrick mannion