When you start to get low on noz go to the highway and get on it then start driving in reverse while you are driving in reverse you will get style points. Once you stop you will more noz. But if you hit a wall or a car you will lose those style points. So when you are on the highway find an area with a straight line. when you do find it you will need to hold your reverse button ( L trigger) to start going reverse while your are driving in reverse hold down the black button to change the camera view so you can look while you're driving in reverse. there is also aother way to refill your Noz (Note: you much have hyro. first make sure that you are stoped press and hold the a button and move the left thumbstick up and down side to side or any other way to get them to work and if you are against a wall or curb start using your hyro. to get your car airbone that way you will get style points for the air time that your car was in the air before it hit the ground and when you race your Noz get refuel every time you pass the finish line and you can also make your car to do donuts and your car will do a 360 spin without hitting anything so you can get some style points from it.