Can any insurance agents out there please tell me - roughly what % discount on the total policy premium would I get if I qualified for the mulit-car discount on my car insurance policy? I am with State Farm if that matters at all. I am currently at $400 every 6 months for my pickup truck & am wondering if we add another car in our household onto the SF car insurance, how much would I save on the $400 every 6 month truck premium? Thanks very much.