cairns so essentially flat travels, 3 kids under 10.
Vehicle in sig.
My experiences:
throughout the year typically 6.8L to 7.2/100km always been around that cty/hwy use.
last summers worst was 8.5L/100km (A/C 100% of the time)
this summers worst is 7.5L/100km (better weather though)
last road trip saw 5.1L/100km Cairns to Airlie Beach and part return. Interestingly my fathers 2015 MD Mondeo Titanium ecoboost recorded 5.5L/100km on that trip. His did well, throughout the year it's more so 7.5-9L/100kms is being seen or typically low 8.2 which is on par with what ford have claimed @ 8.5L/100km. Love getting into his though.
Best distance travelled (sorry I can't remember recording the fuel used) was last year on holidays Cairns to Airlie Beach trip, but I reckon if I had known how to use the trip computer after buying the car, that trip from Brisbane to Cairns would have been up there as it's the longest I've done in one go. Remains a mystery if I could have made it from BNE to TNS in one go. Chickened out and put ~$30 in Mackay and partly wanted to get out to stretch the legs.
One aspect I didn't think of, having the ability to do long K's, means you're in the car more.
that's the best I could give hope it helps.