Chipbox for my Toyota Hilux

<p>I was told the Chipbox will make my Bakkie lighter on Diesel and the performance will be better.</p> <p>The performance is better but I only get 9.7 Km per liter. When I called SAC they told me maybe the settings is not correct. Now how can my settings not be correct after they install me Chipbox and tune it on the Dino and I paid them but after service is very poor. They was very quick to book my vehicle in but don't want to help me when I complain about my poor Diesel Consumption. I must wait they are very busy. </p> <p>This is what I call very bad after service</p>