Preheat oven to 275° convection.
Spray two large baking sheets with non-stick cooking spray or line with parchment paper.
In a large bowl, mix the cereal, oats, and nuts.
In a smaller bowl, beat the egg whites, add the oil and syrup and whisk together. Pour over the cereal mixture and mix with a spoon or your hands until well combined.
Divide the mixture between prepared baking sheets. Spread the Granola in a single, even, layer. If your baking sheets are small, you may need to use three of them.
Total baking time is about 35-40 minutes.
Bake for 15 minutes at 275°. Do not stir.
Reduce heat to 250°, turn pans and rotate rack positions.
Bake about 15 to 20 minutes, until the oats are golden brown, and the nuts look well toasted. (Ovens vary so if granola is getting too brown, reduce cooking time).
Using a spatula, turn cereal over, maintaining clusters. Bake an additional 5 minutes.
Let cool completely in the pans. When very cool, gently mix in the raisins.