Need With Setting Up MPG Chart

[EP3]

Do I put the chart in the signature place or through the garage section? Is there a patular link I should use? Just not good with these basic things.

[Daox]

First off you need to enter a tank into your garage's fuel log. Then, follow these instructions.

[EP3]

Sweet I was just checking.. When I fill up I will do this to see how I am doing.
Thank You.