These figures are from Alion 240. It does not come with a fuel consumption meter.
And, I have been using this Tachyon Tool for about 6 months and I find it fairly accurate.
Other than giving 25 individual trip data, it gives average value for these 25 trips. So it’s easy to compare with actual.
Also few of my friends have tried this Tachyon Tool in a new Corolla 2014 in US and a Premio 2014 in SL. According to them, this unit is accurate than the values shown in their cars.