That's what you're supposed to use.
Use 91 octane or higher octane rating premium gas for the 2009 Lexus RX350
Premium, 91 or higher
93 octane, one of the top tiers if available
Yes, a 2009 KTM 400 xcw uses 97 Octane or higher.
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.
Most professionals recommend that you use high octane gas. Like 92-94 octane.
You should be fine with 91 octane. The higher the octane, the more you engine will like it, but 91 octane is enough for your ES 350.
unless the vehicle manufacturers instructions specifically state to use high octane fuel, or you have done something to boost the compression ratio, (i.e. supercharger, turbocharger, etc,...) you should be fine running regular 87 octane.
Use "regular" gas - usually 87 octane.
" regular " unleaded , 87 octane
use's regular 87 octane which can be bought at any gas station and you can use 93 octane also.
Octane is a liquid, not a gas. Its boiling point is considerably higher than that of water.