This comes from putting two recipes together. It's delicious!
In a large bowl, beat oil and sugar together. Add eggs, and mix well. Stir in bananas and vanilla. Then add dry ingredients and mix well.
Divide batter into two greased 9 x 5 loaf pans and bake at 325 for 55-60 minutes. (I have baked it at 350 along with other sweet breads and it has done fine, too).