Do I need any special tools or hardware to install this?

No. The filter drops into your factory air box. You'll need a screwdriver to remove the air box cover and disconnect the intake hose — both standard tasks. No fasteners or adapters are included because you're using the factory housing.

How often should I replace this filter?

Check your owner's manual for the service interval — typically 15,000 to 30,000 miles depending on driving conditions. Heavy dust environments require more frequent changes.

Is this filter pre-oiled or ready to install straight from the box?

Install it as-is. Do not apply any oil or coating unless your specific diesel setup requires a pre-oiled element — verify in your service manual first.