Car rental in Thailand

I have to go to thailand for 2 months and we need to rent a car> Does anyone know a good place with reasonable price, not as I find until now 20 euros per day.
Thanks to anyone who can give informations.

What type of vehicle do you want to  use? Where will you use it?

I think your making a mistake looking for the cheapest possible rental you can find.  You run the risk of getting one without full coverage insurance and in the end you will pay more because when you return they will want to be paid for any little ding in the the vehicle.  Go with one of the major foreign rental agencies with full coverage insurance.