Thanks for providing some info, sadly the 29mpg on the hybrid is not the norm or good (had to convert it to 8.1l/100kms like a normal person) it looks like your buddy is doing some great mileage compared to say the info from https://www.fuelly.com/car/chevrolet/silverado_1500/2011?engineconfig_id=&bodytype_id=&submodel_id=62. As for the fuel use of a kei truck, I have only seen those sort of numbers on high speed highway driving as they are just not geared for it. I would love to be able to by a smaller truck, or even a new version of an older one. The issue is we are not given many options other then a kei truck designed for the urban focused Japanese market or a stupid massive van with a 4 foot bed.