What is the cheapest way to improve fuel efficiency in a Nissan Patrol?

I recently purchased a Nissan Patrol and I am looking to save some money on gas. What are some cost-effective ways to improve fuel efficiency in this vehicle?

Regular maintenance can greatly improve fuel efficiency in your Nissan Patrol. Make sure to change the oil and air filter regularly.

Invest in a set of low rolling resistance tires for your Nissan Patrol. They can significantly reduce fuel consumption.