Originally Posted by R Leo

Unless your insurance is really different than most personal P&C policies, that grace period isn't intended for commercial use. One way to find out is to get in a wreck during that grace period in a car that you just bought. If in the course of settlement, the carrier gets wind of the fact you're flipping cars, they'll drop you in a heartbeat, making it retroactive to a point before the loss, leaving you holding the bag for liability. I'll bet there's even a clause to that effect buried somewhere in your policy.