8th Sep 12 Enquiry This is not an enquiry but instead its a big thank you. I didnt fit my unit until my car had had a service so I waited and waited then I fitted it oh boy is it good I am getting about 3 mpg more and if I use the loud pedal then it just goes like a rocket it is soooooooo much fun. So thank you very much every body should buy one of these Mark C Update23rd of October 2012 Have just got 36 MPG out of my TDV8 Range Rover since fitting a red box and travelling 670 miles from one end of the country to the other thats 6 miles MPG better than before thank you very much