Last summer I took the family on a tour of Ontario and Quebec. I wanted to rent a minivan, at the last minute it was changed to a Trailblazer (some story about two of the rental agency's minivans involved in accidents in one week).
It was reasonably confortable for 3 adults in the rear seat.
I drove Hamilton -Toronto- Ottawa-Quebec-Montreal-Toronto-Niagara Falls-Toronto-Hamilton, including some city driving and keeping the speed limit most of the time.
Bottom line: a bit less than 10 l/100 km.
I was surprised - two years earlier my '00 Caravan, 3.0 liter engine, same passengers, did about the same on Calgary-Kelowna-Vancouver-Victoria-Kamloops-Calgary.
