How much applesauce can I use instead of oil? Would the muffins still be airy if I use applesauce instead of oil?

I know that it's easy to get tempted to replace the oil/fat in a baking recipe with applesauce to make it fat-free, but that would result in dense and dry muffins. It won’t be as airy as using oil alone. So I would suggest just replacing half the quantity of oil with applesauce.