EPS or ESP? I believe EPS is a 4-wheel drive mode. So, if that's the case you would definately get better milage with it off. It shouldn't hurt a thing.
Now if it's ESP that's the traction control system and can't be fully turned off. But even if it could it shouldn't affect the fuel milage.
Now if it's ESP that's the traction control system and can't be fully turned off. But even if it could it shouldn't affect the fuel milage.