Does A 2024 Lexus Rx350 Require Premium Gas Or Not. While your lexus rx uses regular (unleaded) gas with an octane rating of 87, your lexus suv can take premium fuel with an octane rating of 91. They also priced it higher than other grade fuels.
You must only use unleaded gasoline in the rx, with an octane rating of 87 or higher. They also priced it higher than other grade fuels.