I get around 12.5 l/100 km (19 mpg?) if I got easy on the throttle, and around 18L/100 km (13 mpg) on a rough road. There is no feedback loop since it uses on carb, so as long as I keep the throttle steady it isn't that bad. Of course it can't compare with modern SUVs but not too terrible either.

Economically wise, a 2 years old mid sized SUV here costs around 40000 USD, meanwhile I bought my FZJ80 with 6000 USD (with 200000 km on the ODO). Even if I drive 1000 km a month it will take me more than 30 years of driving to start losing money compare to buying a modern one.