fuel economy

Russell,
May be of assistance here - 80 series 1HZ naturally aspirated donk, pulling a 2440Kg tare / 3500Kg total, 19ft Bush Tracker (80 series is Nov 1996 build = 3500 /350 tow capacity from factory) gave us figures of 4.25 k/L including touring Tasmanian mountains regions.
Since then we have had our service people put on an ATX turbo at around 220,000 k's on the clock and have done Adelaide to the Kimberley and Adelaide to Cape York etc with figures around 4.75 k/L We are very happy with that as all up, with Modified 80 series GVM of 3350Kg + van at 3500 Kg = 6850 Kg we have a VERY Heavy rig on a 4.2 Litre donk)
Cheers Mobi

Tare weight is going to be conservative on that van. Pulling it with a N/A 1HZ 105 series is going to be depressing on the highway and hills.

Pulling it with a bolt on turbo onto a 1HZ is going to be expensive if you don't monitor the engine EGT's... overfuelling will kill a 1HZ if it's not understood and watched.

Back to the 105 and caravan, I reckon you will be doing around 19 litres/100km taking it easy and it gets worse from there. It's a 3 ton 4wd with 96 KW...without tacking another 2.5 ton on the back.

I have a 105 and had the 1HZ and for towing it was abysmal. Add a turbo, the fuel was still hungry, but performance a bit better, but you have to manage the EGT's.

Put the correct motor into a 105..the 1HDFTE and you have a brilliant 4wd and towing vehicle. ;o)

Never mind the TARE Russell; what is the ATM? This is what you will most likely be pulling when you get it loaded up and water tanks full. What is the maximum your Cruiser can tow? Look also at the GCM for your vehicle.

Regardless of brand of tow vehicle, you will use a lot of fuel towing a large caravan, and i don't think the difference is huge between different vehicles.

We were originally towing our Bushtracker with a 3 litre td Patrol, and got five kilometres per litre. With the F250 carrying a heavy load and the van packed heavier for longer trips we get around 4.5 kilometres per litre. Not a fair comparison due to load differences, however our caravan has a similar TARE to the Supreme you are looking at.

Motherhen