And most people can manage at least a 5% loan. Spread over the outstanding balance, that's a 2.5% discount. Yay.
I'd still roll my own deal
1. Haggle like a ferengi for the lowest price
2. Pay 100% down 0% interest for a $0 monthly payment
I know, there are those who would say to take the 0% loan and keep the cash in an investment pocketing the spread, but there's also the concept of saving, and paying for things as you can afford them and having the peace of not having debt over your head. Walking into a dealership and signing for payments doesn't activate the pain centers in your brain - so it makes it all to easy to rinse and repeat on another car, a truck, an ATV, a Sea Doo, a bass boat, pool table, zero turn mower, etc. whereas, when you walk in with a check and see your bank account get significantly smaller, that pain will cause you to make sure this is really what you want and need, and that you can handle it, causing fewer regrets.