My wife's 2019 Rav 4 is 0w16. I was like 0w what? OK. it is what it is so thats what I buy. 5w20 is acceptable if necessary it says but I don't deviate from mfg requirements even if my other vehicles are 5w20according to my wife who designs oil for castrol its all about fuel economy and the new CAFE regulations. Tighter tolerances higher operating temperatures and better additives allow for it to still provide plenty of lubrication. The next thing will be 0w16.