Why do you not quote Kmpg or Performance gains for vehicles?
The system is designed to increase the performance & lower emissions of a diesel vehicle so kmpg economy gains are therefore classed as a bonus, Kmpg gains cannot be calculated for this simple reason — every driver drives a vehicle differently so will always get a different fuel return as the gained economy can be used as a fuel in power, etc.. to quote an kmpg gains would therefore be misleading you, so kmpg diesel fuel savings can be used as extra power & performance depending on how you drive! gained performance & Torque figures again cannot be calculated without testing every vehicle converted on a rolling road (dyno), etc.