car insurance guest driver

Do all cars on the road CA need to have insurance or driver is all you need insurance?
I have 3 cars. I would like coverage so that if I have a score out of town or whatever, you can use one of my cars. Why ask other drivers about home? What is that to do with that. What if the person who was driving my car was in a long stay … (in my house?)
An out of town guests only must be listed on your policy if he / she will be visiting your car and the loan for a long stay, usually 30 days. Your insurance covers a driver while he / she has a valid driver's license. If you visit, I am covered, as is his vehicle, if you lend me your car. If you have an accident at the fault, and responsibility is not enough to cover my liability coverage on my policy comes into play (I never spent more than $ 1,000,000).
herecomesgoodbye 1X04