What is the best way to keep my Nissan Patrol's engine running smoothly?

I recently purchased a used Nissan Patrol and I want to make sure I am taking the necessary steps to keep the engine running in top condition. What are some regular maintenance tasks I should be doing and how often should I have them done?

Regular oil changes are crucial for keeping your engine in good shape. I recommend changing the oil every 5,000 miles or every 6 months, whichever comes first.

Another important maintenance task is replacing the air filter. This should be done at least every 12,000 miles or once a year. A clean air filter helps your engine run more efficiently.

Don't forget to check your coolant levels regularly. Low coolant can lead to overheating and engine damage. I suggest checking it at every oil change.