Fuel Consumption

Thanks Boxer, I agree with you. I get 12 to 12.5 around town without a vat & have checked the usual things like wheels are running freely, tyre pressures in the van (run 42lb on tandem axles, hankbrake is off, Tyres & wheel hubs are only just warm after a 200km run at about 85km on highway.
I have written to Toyota about the problem & they sent my a rude reply telling me it must be my bad driving as their dealers would have checked everything when I complained to them about it at Darwin, Bundaberg & Nambour when in for service.

I should proof read my follow up - it should have been van not vat

is yours manual or auto?

Mine is Auto
What does the van weigh?
Are the tyres light truck tyres? - if so they recommend 55-60PSI, thats what I run on the boat trailer (tandem also)

I will have to double check my figures as most of the time I tow the boat it is only 100kms max or so - therefore it averages back down to 12lts overall when I fill up once the tank is empty

Thank you for staying with me on this one Boxer.
It is auto (as you probably know, whith the current model, the computer locks up the torque converter when the load remains constant for a certain amount of time, so that should help the situation.
The van weighs 1420kg empty, and 1800 to 1900 kg loaded (depending on where we are going & what we need to take
Yes - light truck tyres (They are running very cool - if under inflated they would warm up), Their side walls are standing up straight. I have driven seni trailers, so understand the inportance of correct inflation. I will try inflating them a bit higher & see what happens.

I normally travel at about 85km/hr, but on very good road on the flat will let it run to 90 - 95km

The book tells me to drive in low high, but ahve tried high high (h1 &h2), without inprovement.

Air filter good. Changed every 10.000km with a genuine Toyota one. & never been off the blabk stuff.
Thank you for everyones help, Particularly BOXER. I am starting to get the feeling that I have a dud one. Would have been nice to get some back-up from Toyota.