Is 0w20 oil recommended even for triple digit temperatures?
From the oil chart 0W20 is good till you hit 110 degree temps and that is a fixed temp. so if you live in the states a sustained temp of over 100 is not very likely. Toyota states that you can use 5W20 but only if 0W20 is not available.
Search Lexus RX 350 Questions
Lexus RX 350 Experts