Consulting a repair manual or a mechanic is the best way to go here because you want to be precise in your adjustments, but it's easier than it sounds. The reward is lots of reduced emissions and greater fuel economy. When it comes to other possibilities for reducing emissions, regularly replacing filters and fluids in the car can help immensely. The recommended times for replacement are written down in the repair manual and should be followed. The amount of air in a car or truck's tires has an effect on how much fuel is needed to overcome the friction caused between the tires and pavement.
Less air equals more friction, more fuel and more emissions.
More air equals less friction, less fuel and less emissions. You'll need a tire gauge, which is cheap. Speaking of driving habits, let's talk a little about diem. Maybe you're someone who likes to go racing around everywhere like you're driving a Formula one car. The habits of drivers can be the number one cause of increased emissions, poor fuel economy, and, incidentally, road rage.