Purely seat of the pants, but I've used Edge 5w30 & 5w40 and found it to be a smooth & quiet oil. I have no reason to doubt it's performance in 0w20 (especially with the high quality base stocks 0w20 has).
I like this ladies thinking. Take care of your car. My dad always said cars are a machine. Machines need care. Take care of your car and it will take care of you. So few people treat thier cars like they should be. I also think this lady is taking care of herself. I am impressed how well she walks. How well she articulates her thoughts. She has done well for herself and done well with her car. Oh and my dad owned this model car while I was growing up. It was a nice ride when we took family vacations.
Everyone is telling you to use 5w30 but you specifically asked about Castrol Edge 0w20. 5w30 is a great year round oil where you live. Seems like you're intent on using 0w20, so yes that brand is a good choice or just about any other major brand 0w20 including Super Tech will do. Good luck.