Quote Originally Posted by TPC View Post
It is interesting to see your fuel economy, I did a trip from Adelaide to Fraser and back last year and averaged 17.5 L/100km towing camper trailer and loaded roof rack.
Your figures would suggest that the roof rack makes more difference than towing a camper.

Driving over to Geelong I got 11.2 L/100km with no trailer or roof rack.

Our holidays are now kid free and with camper and it is definitely more enjoyable and much less stress but I did enjoy the trips when the kids were young and they still talk about them years latter.
Father in-law has noticed roughly 1-1.5L/100 K increases when adding roof rack or camper for each.
So if you have rack and trailer then is 2-3L increase. I guess if you stick to 100km/h it'll drop back again, and his figures are from a TD prado auto trans On 32" tyres..