Need advice shopping for all season tires to replace stock P215/50R17 90W on my 2013 Prius V. Driving style is grandma, not spirited at all. I'm all about hypermiling. My short list came down to: 1. Michelin - Pilot Sport All Season 2. Michelin - Energy Saver A-S ($250 more compared to #1 once install price is factored in) My only concern with Option #1 is Speed Rating: Y. Would this make my fuel mileage suck? Google searches tells me top rated is the Michelin Energy Savers A-S for low rolling resistance. I can live with a bit of fuel inefficiency but just uncertain how bad a Y-rated tire might be on fuel. Thanks in advance for your thoughts.