Use 91 octane or higher octane rating premium gas for the 2009 Lexus RX350
The 2008 Lexus IS-350 runs on premium unleaded (required).
The 2009 Lexus IS-350 runs on premium unleaded (required).
The 2011 Lexus IS-350 runs on premium unleaded (required).
The 2006 Lexus IS-350 runs on premium unleaded (required).
The 2012 Lexus IS-350 runs on premium unleaded (required).
The 2007 Lexus IS-350 runs on premium unleaded (required).
The 2013 Lexus IS-350 runs on premium unleaded (required).
The 2014 Lexus IS-350 runs on premium unleaded (required).
The 2010 Lexus IS-350 runs on premium unleaded (required).
The 2013 Lexus RX-350 runs on regular unleaded.
The 2012 Lexus RX-350 runs on regular unleaded.