Since you are out of most manuf. warranty period (3yr 36K miles) you most likely can NOT buy a manuf. warranty, but it's worth looking into.
3rd party warranties suck because (in general, read the contract not the pamphlet):
1) They must approve all repairs, and only at 'approved shops' or you won't get coverage. = PITA (See #3)
2) They don't cover many things you'd want, or only parts of things (if it's a wear part, then they won't cover it, so that takes out shocks, brakes, belts, hoses, etc). Most of the repairs they do cover, have a wear part associated so you'll usually end up paying for part of those as well.
3) Even if you know they do cover it, YOU have to negotiate between the shop and the warranty company to resolve 1 and 2.
If you figure in the cost of the warranty ($1-2k) + $50-100+ each repair, you can really afford a lot of repairs (at a good small shop) yourself before it pays off.