I called my insurance company, they said I am all set to decline the extra, they cover me. I also called my Visa who said they also cover me.
My rental car company charges 10 dollars per day extra to have another driver listed on the car (over 25) and my insurance company said as long as the other driver is insured w full coverage there is no need to pay the extra 10 bucks a day to have them listed on the car. My insurance company did, however, tell me to make sure any tiny scratch ding or dent is listed on the check out form, and make sure they check it back in with no damage. He said there has been a huge rise in car rental companies trying to charge for damage. So i will save all my papewrwork.