I don't know, I was talking to my insurance agent yesterday about adding another car to my policy. I was asking about multi-car discounts, and she said:
"Well, your Acura gets the multicar discount but is billed at the under-25 rate since it is your primary vehicle. The Pathfinder, as an additional vehicle, gets the the multicar discount and is billed at the over-25 rate. So you save some money there."

I discovered that I could get liabilty coverage on an additional vehicle for only $20 more/month. :rick:
Time to do some shopping.