Bah, I use premium non-ethanol in my Mazda 3. 🤣. I suggest using it in any Japanese vehicle. Or any vehicle at all that isn’t Flex-Fuel, so I don’t even consider that when buying a car. I actually PREFER it that the manufacturer recommends Premium. That probably means the tuning is geared more towards performance. But if you take in to account the reduction in repair and maintenance costs on a Lexus vs just about anything else you’ve mentioned owning or considering owning, there’s no question imo that the Lexus is the far superior choice.