Just curious to see what fuel grade (regular, extra, premium) you use in your RX. We have an '08 350 and have only used Premium. Someone told us recently that they use regular unlead with no issues. I have asked the dealership and have gotten mixed answers.
We also have an '06 GX470 and because of the V8, here too, we've always used Premium. Someone at the dealership told us that we could use regular and add "fuel boost" (?) but when I stopped at an Auto Zone Store, they talked me out of it.
Thanks for any and all feedback.