What is the best type of oil to use on wooden knife handles for maintenance and protection?

The best type of oil to use on wooden knife handles for maintenance and protection is mineral oil or food-grade mineral oil. It helps to moisturize and protect the wood, keeping it in good condition. Apply a thin layer of oil and let it soak in for a few hours before wiping off any excess. Repeat this process every few months to keep the wood looking its best.