DreadPirate, you are really not calculating correctly. I know it sounds cheap, but it isn't. If you can get there for $30 in gas, that's 40 miles per gallon -- not bad. Still, that's 7.5 cents/mile.
Say you bought a used car for $10,000, and can drive it for 100,000 miles. That's 10 cents a mile. More than gas.
Oil changes every 5,000 miles at $40? That's another penny a mile.
Tires at $300 every 30,000 miles? Another penny a mile.
Let's not talk about what your time is worth (you might really enjoy the drive), or insurance (not too dependent on miles driven) -- but still, that's about 20 cents a mile, or $80.
Most people don't really like to think how expensive driving is, but it isn't cheap. We have been taught that it's all about the gas, but it just isn't.