You know what will happen don't you, you will disable it and you will play it for a long time, and something happens and you lose all that game play.
You will cry.... like a little girl :P
I think its in the options like save on travel etc.
EDIT: Actually there is only one auto-save, when you go into your journal in game, which you can turn off.
[Edited by DABhand, 10/11/2012 5:26:37 AM]
I should keep that in mind, Anyway it seems like it don't work to disable the auto save feature