trying to improve towing performance of 3l di auto

[threedogs]

All this thread has done is completely prove to me I've been towing wrong all along. I usually tow with OD on and drive through the gears with the stick from 1st to drive. 285 size tyres and the rig cruises at around the 2000 rpm range at 100kph fuel usage is around 17lph around town and 21lph towing, ok so my car is very heavy compared to most and I constantly have the car loaded as nowhere to empty the stuff out like (spare tyres and draws). I understand that every car is different in wieghts and fuel usage and such.... But my figures sound a lot high than everyone else's.


Edit: Auto

I tow in OD mainly going to the Murray river which is slightly up hill all the way.
The HWY is 110 kph which I set my cruse control to about 105kph no rush. eh
My 2004 Di auto will return 15ltr/100Ks. Never had any issues, that was with 285s and sometimes 305's
Picture shows my camper ,which is a 2010 Hilux single cab tub Ive converted to a camper