Take a look at these OEM fluids and oils. The Honda 0w20 oil bottle looks like a Conoco bottle while the Honda 5w20 looks like a Mobil product. Interesting. Bet you can't guess what oil costs $37 for 50mL.
http://www.artsautomotive.com/GenuineFluids.htm
http://www.artsautomotive.com/GenuineFluids.htm