I installed a race chip in my 2013 GD in order to get 6.3 L/ 100 KM. I have the 6 speed Auto 1.6 CRDI 128 HP. Without the chip I was getting 7.4 to 7.8 L/ 100 KM.
Not that your GD diesel is in anyway similar to the PD turbo petrol Dazzler is referring too

but that is quite poor economy for a diesel...even with the chip

Bit of a road trip in the Dazzler Edition today. Economy was very impressive with a bit of help from road works ( reduced speed limits)

That’s great economy Dazz

amazing how much they can vary with small speed changes, you’re nearly down in my realm which is usually between 5.9 and 6.2.
I filled up yesterday on the freeway and took a straight run to Dave’s and back and managed 5.3

best I’ve done yet and probably due to not being a breath of breeze.