Camry 4 cylinder runs **** on fuel, Why do Toyota sell that thing, When the Aurion runs better with more power, Work that out?.
I'm proud to say my Berlina since i have been driving it on the road is using 12.4l/100. I'm very happy with that currently.
Be much better once i replace a broken coil, And 2 year old plugs and leads

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Last look wasn't the Omega using 10.7l/100 ??.
Anyway i got an idea, Stick 5 fattys into a Camry or Corrola, Then do the same with a Falcon/Commodore.. Use the A/C it's hot 30+deg.. See who uses more fuel then

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Example, Sisters Gen2, With A/C on 1 in the car, Uses 2 litres more average, From 6-7 towards 10.
VE Calais V6, 3 adults in car with A/C on, Average 8.8l/100.
Both highway driven.
I can also talk about suv types.. Territory took me to Bathurst in 05, 3 tanks of fuel.
Wasn't to impressed with economy, Was impressed with the Terra, But no it's fuel.