Monroe8831

According to the book I should be using only premium gas in my new LS460. My neighbor, who was in the petrol business, swears I only need unleaded-- or unleaded plus-- but not premium. I always used premium in my 2002 LS. Has something changed? Also, I have the AWD LS 460. Is it everyone's experience that it is nosier than the rear wheel drives of yore? Thanks for having this forum. I look forward to hanging out here and learning a lot about my new Lexus 460.. Marylyn