Most experts agree that there is no measurable benefit to using higher octane gasoline. If your car says to use a higher grade, it should be heeded, but if not, use the "cheap" stuff.
I would use 91 octane gas. That is what I used in my Honda Elite 150.
The gas octane that would be the best in a Honda CR-V from 2009 is 87 octane. Higher octane gas will improve its performance, but it is only necessary to have 87.
87 octane regular
87 octane regular. The use of any higher octane will provide no benefit whatsoever and is a total waste of money.
87 octane should do fine. If you find it knocks a little then go to 89 octane. You can always use 91 octane, won't hurt, just in the pocket book.
The manual calls for 87 octane. I use 91 octane in mine and it helps with the pinging sound. Try it.
Yes, use only 87 octane regular.
"Octane" is the measure of a gasoline's resistance to igniting before you want it to, and all gasolines have an octane rating. A Honda Accord runs on unleaded regular...so how you use "octane" fuel on an Accord is to go to your favorite gas station, push the button for the least expensive gasoline they have, and fill your car with it.
According to the manual, 87 octane, regular unleaded is adequate. I have a '98 CRV with nearly 200k and that's all I use.
The 1994 Honda Prelude is best run with 91 octane fuel or higher. The vehicle is designed for use with high octane fuel.
Most professionals recommend that you use high octane gas. Like 92-94 octane.
The 2009 Honda Pilot runs on regular unleaded.