I am intreged by the adjustable gizmo, as i was not aware of any that worked on the ZS...
The only reason your economy is suffering is because you are using your new found torque
according to my scangauge with the injectors i have i can get it to read 2MPL, or about 9MPG with full throttle used - but if i am sensible and keep the revs below 3K and use part throttle it still returns 45 at 70+10%.
atm it is returning 0mpg as it is in bits at rally matts - dam these suppliers, i want my car back, and when i do it might just be a 180... but a diesel