I drive in january-february from Romania to Bamako, Mali, with an extra loaded 200 Tdi Disco 1, with standard fuell tank (80 liter) and 2 extra jerry can. I realy don't use the jerrycans. Fuel consumtion 10.3 litr/100 km
The complete movie from Team 283 Race to Bamako is finaly ready and downloadable for free here;
Race To Bamako The Movie : Movies > Documentary - Mininova
Enjoy