Randy at Maximum Velocity has done some tests using NyOil II as a lubricant. He found out that NyOil is twice as fast as the powdered graphite you get in tubes. Better yet, it lasts for months and for dozens of races before you need to re-lube.
It’s not a dry lubricant, but soaks into the wheels so it doesn’t drip like spray silicone does. Check with your rules person to see if it’s allowed.