Here is some information from the trip:

• Total number of days: 1055
• Odometer total: 143470km
• GPS total: 162947km (difference between GPS and odometer was surprisingly big!)
• Countries: 52
• Borders: 103
• Fuel total: 6300l (1664 US Gal)
• Fuel cost: €6000
• Average fuel consumption: 5,30l/100km (44,4MPG)
• Lowest fuel consumption: 3,95l/100km (59,5MPG)
• Highest fuel consumption: 8,38l/100km (28,1MPG)
• Average fuel price: 0,95€/l
• Cheapest fuel price: 0,29€/l (Indonesia)
• Highest fuel price: 1,98€/l (Turkey)

More information a bit later.