Preheat oven to 350º F. Grease a 9 x 5-inch loaf pan.
On the stove or in the microwave heat the milk until near boiling. Add the Hot Apple Spice tea sachets into the milk. Allow to cool. Strain through a sieve, discard solids, and reserve milk.
In a large bowl, mix together flour, baking powder, baking soda, cinnamon, and salt. Set aside.
Cream together, with an electric mixer, the butter and sugar until light and fluffy. Add the eggs and mix until incorporated. Beat in the oil and vanilla extract. Gradually add the flour mixture. Stir in the tea brewed milk, mixing until the batter is uniform and smooth. Spread batter evenly into the prepared pan. If desired, sprinkle with the rolled oats.
Bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.