85 minimum
The information is in your Owners Manual. All years of the CR-V take 87 octane fuel in the US.
Not less than 87 octane.
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.
At least 87 octane Ethanol blended gasoline fuel.
The current factory recommended replacement mileage is 105,000 miles.
If it has a sunroof it is an EX if not, it is an LX.
My manuel shows 87 octane gas. 2001 gets 28 mpg but with ethonol added milage has dropped to 25/26 on highway.
Any gasoline rated at least 87 octane.
Supreme
Yes, use only 87 octane regular.
The recommended size is 205/70-15
According to the manual, 87 octane, regular unleaded is adequate. I have a '98 CRV with nearly 200k and that's all I use.