Fuel Consumption for Wira SE (auto)

[Allantansc]

Anyone driving Wira SE (auto)? If yes, how much is your fuel consumption?
Mine full tank can run up to 380km (normal city driving)

But after I installed Air Power it can run up to 400km (normal city driving)
Of course, more power when accelaration.

Any other way to further improve fuel savings on Wira SE (auto)?
Please advise.