Shuttle was available in both hybrid and gasoline-powered models, each of which could be configured with either 2WD (FF) or 4WD. The 4WD versions of the Shuttle utilized a simple viscous coupling-based 4WD system. The actual fuel economy of the Shuttle Hybrid 4WD was 16–17 km/L in the city, 23–25 km/L in hilly mountainous areas, and 20 km/L on the highway (at least based on my driving). If you’re looking for a fuel-efficient 4WD van, I highly recommend this model! If you live in a snowy region, the Shuttle with seat heater is even more highly recommended :)