I know it depends on the driving style, habits etc but what's ball park figure for daily driving V6 3.6L (2007) in highway/city mix?
I've seen figures as low as 9 mpg (that's about 25l/100km) but is something like 15-20mpg achievable?

 

I hope your goal is achievable. I am getting 15 mpg all day long with V8 CS...I would expect the V6 to do a little better

 

We just took our V8 CS (957) on a 2800 mile road trip and averaged 17.7mpg per the trip computer...

 

I would get 21mpg on my 2010 v6 driving to Florida. I would also use 87 octane fuel

 

19-20 consistently on our 2009 3.6. Has 18" wheels. Live in flat Florida now and north east area that is not stop and go. Our 2016 is new to us and with the same engine is getting 22-26 depending on the trip.

Mark