Sometimes the map is wrong. Across the mountain to Girdev Lake.

Years ago I thought of driving around Turkey in my own car. But considering what I had heard about driving culture in Turkey, it seemed too scary, so I made other plans.
How silly I was!
Turkey is a country of excellent roads, and very civilized drivers. As a Norwegian, when driving in Turkey I often find myself in situations where I can slalom between cars simply because my driving style is more aggressive. And I am a driver that never has been fined for any traffic offense in my native Norway.
Car rentals are booming in Turkey, with good reason. It is a stunning country, and although public transportation is well developed, it is not always connecting well to tourist destinations. Car rental prices are becoming quite competitive, in May 2009 I paid from Dalaman Airport €142 for a week in a brand new Renault Symbol. It was a small engine thing, but this was the cheapest deal, so if you want something that climbs those mountain roads without you having to gear up and down all the time, put some more money on the table and you get exactly what you want.
Petrol prices are high, though. Again referring to my own Norway; our media tend to call Norwegian petrol prices "the highest in the world". Seems that too few journalists travel to Turkey. In May 2009, 95 octane benzine was 17% more expensive in Turkey than Norway. This is a permanent situation, expect to pay ca. €1.50 per litre (3.07 TL).
Turkey has plenty of gas stations, chances are that you will never find yourself tens of kilometres away from a pump with your fuel tank running dry. Although stations look as modern as anywhere else, Turkey is a country where employes fill your tank. Since they speak no foreign language, and I no Turkish, this is what I do: I give them my car key and the exact amount I wish to fill for, and a minute later I get the key back with a printed receipt. I have tried to spot whether the employes expect a tip, but have seen nothing but friendly faces driving away paying for nothing but gas.
Gas stations offer other basic services, many come with a garage for simple repairs.
As mentioned, road conditions are excellent, aided also by the low intensity of traffic. Is it the gas prices that makes less and less Turks drive? Driving in cities is slightly more of a challenge, but Turks keep their good spirit here, too. One thing that is highly confusing, is the Turkish roundabouts, as they have traffic lights inside the roundabout and cars stop for crossing traffic.
Road signs are well organized, and there are plenty of fine road maps at sale.