Heat oil, maple syrup, peanut butter, peanuts, brown sugar, and salt in a large skillet over medium-low heat until completely combined (about 2 minutes).
Add oats and continue stirring, to coat, for about 5-10 minutes (or until oats are toasted and golden brown).
Transfer oats to a cookie sheet or large cutting board to cool in a single layer. I like to use the back of a large spoon or spatula to gently press the granola firmly into the cookie sheet. This helps it clump together as it cools and hardens.