Can I use oak leaves for mulch?

https://www.southernstates.com/commercial-agriculture/news/acorns-and-oak-leaves.aspx

I was told you can, you have to mulch them down. use a mower and just keep on running over them until they are chopped into small pieces.

I don't recommend using whole, newly fallen leaves for mulch. Mice and voles like to live in them and will destroy your plantings. Imagine having a 4 ft Osmanthus suddenly keel over because something has eaten the roots. Or a 2 ft camellia, or a 3 ft evergreen. If you can shred them, or compost them, then yes, oak leaves make excellent mulch.

You can, but you might want to combine them with other leaves and work them into the soil

I once trimmed and raked. Set aside to dry, then having put in burn pile . having hose and shovel and bucket handy. Turned it into ash dirt. It made excellent plant food and dirt.