I do not see how this would boost ones credit score when all you did was shift the debt. Secured or unsecured your credit score is based in your ability to PAY the debt. You did not pay the debt you just moved to a different lender. I do not see how one could roll credit card debt into a car loan??? You need to supply the bank the invoice for the car the bank owns the car until you pay it off... I do not see how a bank would pay 30,000 for a car that costs 20,000 as if you total the car day one your insurance company will only cover the cost of the car minus depreciation in which case your mandatory gap insurance would cover this??? but this still means the bank is out 10,000??? Lastly secured debit is better than unsecured??? secured debit gets a lower interest rate because you have an asset to cover it in other words you have 30,000 in a bank account that will cover the 30,000 you borrow and the reason the interest rate is so low little risk.. if you default on the loan the bank simply takes the 30,000 out of your bank account you syill have a default on your credit rating....unsecured if you do not pay you have a default and collection agencies chasing you... they could sue you but can not take away your assets...the reason the interest rate is so high as it is high risk....I am glad you found a way to shift your debt at a low rate and it works you... however this is not helpful to people here and a lot of the information you provide is at best misguided.