Which is the better lubricant lock wd-40 or Graphite or Machine?

Graphite is often considered the best lubricant for locks because it doesn't attract dust and dirt, which can gunk up the mechanism. WD-40 is a versatile product that can provide short-term lubrication and cleaning, but it may leave a residue that attracts debris over time. Machine oil can work in a pinch but may not be ideal for locks due to its tendency to attract dirt. For optimal performance, graphite is generally the preferred choice for lubricating locks.