Mazda6oc.co.uk 23rd Dec 13 Hi guys, I installed the tuning box today. It was very simple, about 10mins to fit. The instructions were very good and the guide very clear. I set the switch to medium settings and started her up. No problems, all good. I then took her for a drive and noticed the difference straight away. She pulls very quickly through all the gears and the difference in 6th is great. I thought I would check the mpg whilst out and while I was cruising at 40mph in 5th gear I was getting a constant 80-82 mpg. So looking good. I will update again after a few weeks of use and im planning on upping the settings to see what that does