Hello, my name is XXXX XXX I can help you with your question.
The factory equipped the car with a summer-only tread for maximum dry-weather handling. There is no reason why you cannot switch to an all-season tread design, espectially since you likely do not race the vehicle or need maximum cornering capability. It is recommended that you maintain the same speed rating for the tires to maintain speed/safety requirements, but this is not essential either if you don't drive above posted speedlimits.
Keep in mind though, if you only change 2 tires to an all-season tread, you may affect the handling balance of the car. The all season tires will have different handling characteristics than the summer tires and could potentially result in a loss of vehicle control during performance or emergency maneuvers.
I hope this answers your question.
Thanks,
Mike
ASE Certified Technician
20 years experience, all makes and models.