Man, I'd be happy with that with mine. I got to 490kms before the fuel light came on and put 65l in to it. So about 13.3l/100 which was predominantly highway with a little offroad and city thrown in.
I've got a pretty similar setup and weight. Granted i live in a hilly and congested part of Melbourne, but I'd kind of wish for more. Tempted to put in a long range tank, just for my city trips....

