In Part 1, we looked at the new-car financing you're most likely to be offered by your dealer -- whether from a car manufacturer's finance arm or from an independent lender such as subprime auto-loan specialist Consumer Portfolio Services
The local (and not-so-local) bank
As your first step, check the rates being offered by banks in your area. You can start with the big names like Bank of America
Consider Internet-based banks, too. The money they save by not having to pay for all those marble lobbies and free lollipops often turns out to mean lower interest rates. To get a quick look at their rates, compared side-by-side with some local options, check out Bankrate.com
Membership has its privileges
Your next stop should be the local credit union. I've said it before and I'll say it again: I love my credit union. In fact, I first joined mine in order to get a great rate on a used-car loan and to take advantage of their personal service. (This wasn't quite an ordinary deal: The "used car" in question was a special-edition Corvette I was buying from a collector-car broker -- a glorified used-car dealer. My bank had balked before finally offering me a loan with a crazy-high rate, and I didn't want to deal with the 'Vette broker's shady finance company. The credit union valued the car accurately and offered me a rate comparable to a good new-car loan. I'm a customer for life ... but I digress.)
Anyway, loans from local credit unions can often beat the banks by a full percentage point, and come with personal service -- which often means they'll try to accommodate any special needs you might have. The catch is that you have to be a member of the credit union to benefit, and federal laws limit credit unions to a specific "field of membership." That said, finding one to join is usually pretty easy. Check out the Credit Union National Association's credit union finder to see what's available in your area.
Betting the ranch
Back in my sports-car-driving youth, I knew several guys of normal means who had financed audacious car purchases (think Ferraris) with home equity loans. There are obvious pros and cons to this approach: You might get a great rate, and you might be able to borrow more without busting your monthly budget, but the payments could go on a lot longer; and the consequences of defaulting on the loan are a little bigger than having the repo man drive off in your car in the middle of the night. Still, for some people, a home equity loan can be a sensible choice -- check out this handy-dandy Fool calculator to see if you're one of them.
Looking for other ways to get an advantage on regular expenses? Check out the Motley Fool Green Light newsletter, where Fools Dayana Yochim and Shannon Zimmerman offer up hundreds of dollars of money-saving tips every month. Help yourself to their best ideas, free for 30 days.
Fool contributor and car nut John Rosevear owns shares of Consumer Portfolio Services, but doesn't own any of the other stocks mentioned above. Bank of America is an Income Investor recommendation. Bankrate is a Rule Breakers selection. As Lee Iacocca probably never said, if you can find a better disclosure policy than The Motley Fool's, buy it.