Out of curiosity, what does the owner's manual say?
My wife has always
used
> 87 octane in her RX300 with no problems. The dealer says anything else > is
> just a waste of money.
your dealer is the only honest (or knowledgeabler dealer). all car mechanics and dealer i know are very ignorant on this issue
87 (the recommended) grade is the best for your RX330. higher grade is just a waste of money and serves absolutely no benefit for your car engine.
see this link
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this
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