crockpot mac n cheese

1lb elbow macaroni
1/2 stick melted butter
1/4 cup olive oil
1lb cheddar cheese (block)
1lb velveeta
2tsp salt
2 cans evaporated milk
2 cups milk

cook macaroni until al dente
add macaroni, oil, and butter to crock pot.  Mix to coat macaroni so it doesn't stick
add remaining ingredients to pot and stir
cook on low for 2 hours, stirring after 1 hour