Lay a sheet of parchment paper over the top of a rimmed baking sheet so that it completely covers the sheet.
In a large bowl, mix the Chex Cereal, Captain Crunch, Cheerios, Miniature Pretzels, and M&M's together so that they are mixed well.
In a medium microwave safe bowl, melt the White Chocolate Chips with the Vegetable Oil by microwaving for 2 minutes initially, remove from the microwave and stir well, continue in 1 minute increments until the chocolate is well melted and runny. Be careful, it's hot.
Pour the White Chocolate over the ingredients in the other bowl. Use a rubber spatula to stir the ingredients to ensure that white chocolate gets on all of the ingredients. Sprinkle with the Christmas Sprinkles.
Spread the mix over the top of the parchment paper lined baking sheet. Allow to cool well (30 minutes or more - you can put it in the fridge to speed things up if needed). Break into pieces for sharing. Keep in a sealed container.