What are some tips for maintaining a Nissan Patrol's engine?

I recently purchased a used Nissan Patrol and I want to make sure the engine stays in good condition for as long as possible. What are some recommended maintenance routines and things to watch out for when it comes to the engine?

Regular oil changes and replacing the oil filter every 3-4 months will help keep your Nissan Patrol's engine running smoothly. Also, make sure to regularly check the oil levels and top up if necessary.