Can you use 87 octane in a 2009 Lexus rx350?

Yes, you can use 87 octane fuel in a 2009 Lexus RX350. The owner's manual specifies that the vehicle is designed to run on regular unleaded gasoline with an octane rating of 87. While using higher octane fuel may provide slight performance benefits, it is not necessary for the RX350 and will not significantly improve performance or fuel efficiency.