350 Z in winter and fuel

Hello! As it looks like, I’m going to get a 350 Z. I totally fell in love with this car! I hope it’s the right decision. But I have two questions for you. Do you drive your 350 Z in winter too? How are you doing with it? I’ve been informed about winter tyres, but you can’t put any less tires on it than in summer. That can be a problem in winter, right? Yes and then because of the fuelling. The 350 Z needs Super plus. Ka I’m driving a BMW of 3, so Super plus would be recommended, but I’m always super lead-free. But there’s a difference between recommended and prescribed. Thank you for your answers! Best regards Loonababy