BlueGT

[Lemonskin]

Interesting point. I have no been able to get the combined cycle even with tune below 6.7. Highway I will comfortably get 6.0 but that's it.

Mine is stock, but on a highway run it usually tells me I'm averaging 5.5L/100km (100-110km/h cruise control... and again, the Commodore I had before was averaging mid-high 9's in that mode)