The worse my 1UZ-FE 4Runner has got so far is about 22l/100km, but that was mostly driving on the beach, around town its getting around 18l/100km and on the highway 15l/100km. Its worse around town and offroad than the old V6 (not by much) and better on the highway. The difference the truck is to drive now is worth every little cent of extra fuel. I still haven't stopped smiling since the first time I drove it.