Page 111 of your owner’s manual.
"Fuel Information
Use of unleaded gasoline of 91 octane or higher is recommended.
• Acura recommends TOP TIER Detergent Gasoline where available.
• Do NOT use gasoline containing more than 15% ethanol.
• Do NOT use gasoline containing methanol.
• Do NOT use gasoline containing MMT.
We recommend quality gasoline containing detergent additives that help
prevent fuel system and engine deposits. In addition, in order to maintain good
performance, fuel economy, and emissions control, we strongly recommend
the use of gasoline that does NOT contain harmful manganese-based fuel
additives such as MMT, if such gasoline is available."
In the Engine information section in the back of the manual it states that 91 octane or greater is required.