I am going off of the tire placard, I have seen many Lexus IS300s.
Clueless33:
But keeping the tires at 33 when driving became troublesome as I get the orange light within a week when the tires are cold, dropping to 28 psi.
That is part of your tire wear problem, 8 psi under inflated.
Clueless33:
Was a Toyota employee who told me this.
They might be familiar with Camry and Corolla, but all Lexus IS vehicles 2007 and newer have a minimum of 35 psi.