i love my mechanix gloves -- i've saved myself from countless battle wounds (scars) since using them. They're basically a high-quality but very thin leather glove (palm and fingers) with a breathable backing. They offer some heat protection but i wouldn't trust them to grab an exhaust manifold just after shutting off the car.
They are fantastic for most other tasks though, even ones requiring moderate finger dexterity (they are soft and you can pick up all but the smallest allen keys with them). They also keep your hands from freezing against cold metal although i can't see that being a huge problem in kentucky.
throw 'em in the laundry once in a while with the other car-repair clothes, air-dry, and they're good as new!