I always use water - the Portuguese vorwerk recipe is great and makes a lovely soft dough - made with water. If I can give you an advice: make up today still some olive oil with lots of garlic and pizza herbs (oregano, etc.) - blitz it up in the tm and put in marmalade jar and place in cupboard. This garlic oil is great on pizzas, pasta, etc. etc.
I have read somewhere the concern that garlic in oil is not good for one's health but I have made this many times (begfore I read this advice) and still do so as I have never notices any sideeffects.