If you have 4 autos and 4 drivers can you list your 2 teen drivers as part time drivers on 2 of the cars?

Depends on your insurance company. Some require one primary driver to each car if you have 4 cars with 4 people living in the house. But some allow you to list the parents as primary drivers for all 4 cars and have your 2 teen drivers listed as secondary drivers. Your auto insurance will cover all of you regardless of who is primary or secondary driver.