I have no oil can I still make french fries from potatoes?

Yes, french fries can be prepared without oil by the method called air frying. Just cut the potatoes in desired shape and air fry them. You will get crispy french fries by this method.

Try using an air fryer, or you can make them in the oven.

As much as you could without a gas can.

Maybe if you brush them with butter and 'bake' them in the oven?? 

Yes put them in the oven 

Bake them in the oven. 

Lay your 'raw' french fries out on a baking tray

on a sheet of baking parchment

being careful that none of them are touching

and bake in a hot oven.

Even if you bake them, you need oil to keep them from sticking to the baking pan.

Boil your potatoes or baked them if you don't have oil.

You can make french fries by baking them in the oven

Without 10w-40 you are screwed - OR you could look up oven-baked french fries.