I had a manual gear 1kz surf. Its average was 10 to 11 in city. Highway was also same for me coz whenever i took it to North, had always the roof carrier with stuff packed on it which effected fuel economy.
Then sold it coz i found an excellent 3 door prado 1993 auto gear (1kz). This one gives 8 to 8.5 average in city and 9.5 on highways.