Hi. I was wondering what 0W-20 oil would be good for a 2014 Lexus ES350 that will be taking mostly very short in town trips from now on? What is the latest talk on this weight? This car has always used Mobil 1 synthetic and it has 72,000 miles (mostly highway miles) on it currently. Is it good to switch between brands at each oil change or always stick to the same brand? Castrol, Mobil 1, Valvoline Synpower, Pennzoil? I appreciate the feedback. Thanks!