well i drove two winters on stock summer tiers, i dont recommend it but if you dont have a choice but to drive here are few pointers.
Dont drive faster than 40mph in wet conditions around 35-40F you will hydroplane guaranteed even at those speeds,
dont go faster than 60mph on highway at or below freezing temp on clear road cuz at around 85 mph you tiers will start bouncing and the whole car shakes crazy,
dont accelerate or decelerate fast give ur self distance between cars cuz ur breaking on basically plastic hard tiers is greatly reduced
do not drive in snow what so ever even if its 2mm of snow, it will move but not sure if it will stop
and last is DO NOT TURN OFFF VDC.